# EDGAR Filing Document

**Accession Number:** 0000882381
**File Stem:** 0001133228-23-001057
**Filing Date:** 2023-3
**Character Count:** 52150
**Document Hash:** 5a79ee14e927d28f09f1edcba754b664
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001133228-23-001057.hdr.sgml**: 20230306

**ACCESSION NUMBER**: 0001133228-23-001057

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 4

**FILED AS OF DATE**: 20230306

**DATE AS OF CHANGE**: 20230306

**EFFECTIVENESS DATE**: 20230306

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MORGAN STANLEY GLOBAL FIXED INCOME OPPORTUNITIES FUND
- **CENTRAL INDEX KEY:** 0000882381
- **IRS NUMBER:** 133647664
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-44782
- **FILM NUMBER:** 23707876

**BUSINESS ADDRESS:**
- **STREET 1:** 522 FIFTH AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10036
- **BUSINESS PHONE:** 800-548-7786

**MAIL ADDRESS:**
- **STREET 1:** 522 FIFTH AVENUE
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10036

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MORGAN STANLEY FIXED INCOME OPPORTUNITIES FUND
- **DATE OF NAME CHANGE:** 20111220

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MORGAN STANLEY FLEXIBLE INCOME TRUST
- **DATE OF NAME CHANGE:** 20030711

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MORGAN STANLEY DIVERSIFIED INCOME TRUST
- **DATE OF NAME CHANGE:** 20010618

## Series and Classes Contracts Data

### Global Fixed Income Opportunities Fund (Series ID: S000002382)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000006295 | A            | DINAX           |
| C000006297 | L            | DINCX           |
| C000006298 | I            | DINDX           |
| C000126926 | CLASS R6     | MGFOX           |
| C000155980 | Class C      | MSIPX           |

![](sp15659img002.jpg)

Morgan Stanley

**Global Fixed Income Opportunities Fund**

**Summary Prospectus** **\|** February 28, 2023

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| | | | | |
|:---|:---|:---|:---|:---|
| **Share Class and Ticker Symbols** | **Share Class and Ticker Symbols** | **Share Class and Ticker Symbols** | **Share Class and Ticker Symbols** | **Share Class and Ticker Symbols** |
| **Class A** | **Class L** | **Class I** | **Class C** | **Class R6** |
| **DINAX** | **DINCX** | **DINDX** | **MSIPX** | **MGFOX** |

---

Before you invest, you may want to review the Fund's statutory prospectus ("Prospectus"), which contains more information about the Fund and its risks. You can find the Fund's Prospectus and other information about the Fund, including the Statement of Additional Information ("SAI") and the most recent Annual and Semi-Annual Reports to Shareholders ("Shareholder Reports"), online at www.morganstanley.com/im/GlobalFixedIncomeOpportunities. You can also get this information at no cost by calling toll-free 1-866-414-6349 or by sending an e-mail request to orders@mysummaryprospectus.com. The Fund's Prospectus and SAI, both dated February 28, 2023 (as may be supplemented from time to time), are incorporated by reference into this Summary Prospectus.

**Investment Objectives**

Morgan Stanley Global Fixed Income Opportunities Fund (the "Fund") seeks a high level of current income as its primary investment objective. As a secondary objective, the Fund seeks to maximize total return but only to the extent consistent with its primary objective.

**Fees and Expenses**

The table below describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. **You may pay fees** **other than the fees and expenses of the Fund, such as brokerage commissions and other fees charged by financial** **intermediaries, which are not reflected in the tables and examples below.**

For purchases of Class A shares, you may qualify for a sales charge discount if the cumulative net asset value per share ("NAV") of Class A shares of the Fund being purchased in a single transaction, together with the NAV of any Class A, Class L and Class C shares of the Fund already held in Related Accounts (as defined in the section of the Prospectus entitled "Shareholder Information—Share Class Arrangements") as of the date of the transaction as well as Class A, Class L and Class C shares of any other Morgan Stanley Multi-Class Fund excluding Morgan Stanley Institutional Fund Trust Short Duration Income, Ultra-Short Income and Ultra-Short Municipal Income Portfolios (as defined in the section of the Prospectus entitled "Shareholder Information—How to Exchange Shares—Permissible Fund Exchanges") and including shares of Morgan Stanley Money Market Funds (as defined in the section of the Prospectus entitled "Shareholder Information—How to Exchange Shares—Permissible Fund Exchanges") that you acquired in an exchange of Class A, Class L or Class C shares of the Fund or Class A, Class L or Class C shares of another Morgan Stanley Multi-Class Fund excluding Morgan Stanley Institutional Fund Trust Short Duration Income, Ultra-Short Income and Ultra-Short Municipal Income Portfolios already held in Related Accounts as of the date of the transaction, amounts to $100,000 or more. More information about this combined purchase discount and other discounts is available from your financial intermediary and on page 35 of the Prospectus in the section entitled "Shareholder Information—Share Class Arrangements" and in the section of the Fund's Statement of Additional Information ("SAI") entitled "Purchase, Redemption and Pricing of Shares." In addition, Appendix A attached to the Prospectus contains more information regarding financial intermediary-specific sales charge waivers and discounts.

Class I shares may be available on brokerage platforms of firms that have agreements with the Fund's principal underwriter permitting such firms to (i) offer Class I shares solely when acting as an agent for the investor and (ii) impose on an investor transacting in Class I shares through such platforms a commission and/or other forms of compensation to the broker. Shares of the Fund are available in other share classes that have different fees and expenses.

![](sp15659img003.jpg)

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Morgan Stanley Prospectus \| **Fund Summary**

Global Fixed Income Opportunities Fund (Con't)

**Shareholder Fees** (fees paid directly from your investment)

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| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  | **Class A** | **Class L** | **Class I** | **Class C** | **Class R6** |
| Maximum sales charge (load) imposed on purchases (as a percentage of offering price) | 3.25% |  |  |  |  |
| Maximum deferred sales charge (load) (as a percentage based on the lesser of the offering price or NAV at redemption) | None<sup>1</sup> |  |  | 1.00%<sup>2</sup> |  |

---

**Annual Fund Operating Expenses** (expenses that you pay each year as a percentage of the value of your investment)

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| | | | | | |
|:---|:---|:---|:---|:---|:---|
|  | **Class A** | **Class L** | **Class I** | **Class C** | **Class R6** |
| Advisory Fee | 0.32% | 0.32% | 0.32% | 0.32% | 0.32% |
| Distribution and/or Shareholder Service (12b-1) Fee | 0.25% | 0.50% |  | 1.00% |  |
| Other Expenses | 0.26% | 0.32% | 0.24% | 0.25% | 0.16% |
| Total Annual Fund Operating Expenses | 0.83% | 1.14% | 0.56% | 1.57% | 0.48% |

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**Example**

The example below is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.

The example assumes that you invest $10,000 in the Fund, your investment has a 5% return each year and that the Fund's operating expenses remain the same. After eight years, Class C shares of the Fund generally will convert automatically to Class A shares of the Fund. The example for Class C shares reflects the conversion to Class A shares after eight years. Please refer to the section of the Prospectus entitled "Shareholder Information—Conversion Features" for more information. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

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| | | | | |
|:---|:---|:---|:---|:---|
| **If You SOLD Your Shares** | **If You SOLD Your Shares** | **If You SOLD Your Shares** | **If You SOLD Your Shares** | **If You SOLD Your Shares** |
|  | **1 Year** | **3 Years** | **5 Years** | **10 Years** |
| Class A | $407 | $581 | $771 | $1317 |
| Class L | $116 | $362 | $628 | $1386 |
| Class I | $57 | $179 | $313 | $701 |
| Class C | $260 | $496 | $855 | $1668 |
| Class R6 | $49 | $154 | $269 | $604 |

---

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| | | | | |
|:---|:---|:---|:---|:---|
| **If You HELD Your Shares** | **If You HELD Your Shares** | **If You HELD Your Shares** | **If You HELD Your Shares** | **If You HELD Your Shares** |
|  | **1 Year** | **3 Years** | **5 Years** | **10 Years** |
| Class A | $407 | $581 | $771 | $1317 |
| Class L | $116 | $362 | $628 | $1386 |
| Class I | $57 | $179 | $313 | $701 |
| Class C | $160 | $496 | $855 | $1668 |
| Class R6 | $49 | $154 | $269 | $604 |

---

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| | |
|:---|:---|
| 1 | Investments in Class A shares that are not subject to any sales charges at the time of purchase are subject to a contingent deferred sales charge ("CDSC") of 0.75% that will be imposed if you sell your shares within 12 months after purchase, except for certain specific circumstances. See "Shareholder Information—Share Class Arrangements" for further information about the CDSC waiver categories. |

---

2 The Class C CDSC is only applicable if you sell your shares within one year after the last day of the month of purchase. See "Shareholder Information—Share Class Arrangements" for a complete discussion of the CDSC.

**Portfolio Turnover**

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 62% of the average value of its portfolio.

**Principal Investment Strategies**

The Fund will normally invest at least 80% of its assets in a portfolio of fixed-income securities. This policy may be changed without shareholder approval; however, you would be notified upon 60 days' notice in writing of any changes. The Fund's "Adviser," Morgan

**2**

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Morgan Stanley Prospectus \| **Fund Summary**

Global Fixed Income Opportunities Fund (Con't)

Stanley Investment Management Inc. and/or "Sub-Adviser," Morgan Stanley Investment Management Limited, will allocate the Fund's investments among the following asset classes or market segments: (1) corporate securities, (2) residential and commercial mortgage-backed securities, (3) asset-backed securities, (4) emerging market securities, (5) convertible securities, (6) U.S. government securities and foreign sovereign debt, and (7) derivatives, including interest rate-related derivatives and currency derivatives. Securities may be rated either investment grade or below investment grade and denominated in any currency, hedged or un-hedged. The amount of the Fund's assets committed to any one asset class or market segment will fluctuate. However, the Fund may invest up to 65% of its net assets in any one asset class or market segment. The Adviser and Sub-Adviser have the flexibility to select any combination of at least two asset classes of the aforementioned groups depending upon market conditions and the current economic environment and, as a result, at any given time the Fund's assets may be invested in certain groups and not others.

The Fund's investment process incorporates information about environmental, social and governance issues (also referred to as ESG) via an integrated approach within the investment team's fundamental investment analysis framework. The Adviser and/or Sub-Adviser may engage with management of certain issuers regarding corporate governance practices as well as what the Adviser and/or Sub-Adviser deem to be materially important environmental and/or social issues facing a company.

The corporate securities in which the Fund will invest may include fixed-income securities issued by corporations located in or outside of the United States, certificates of deposit and bankers' acceptances issued or guaranteed by, or time deposits maintained at, banks, commercial paper and convertible securities.

The types of mortgage-backed securities in which the Fund may invest include mortgage pass-through securities, collateralized mortgage obligations ("CMOs"), stripped mortgage-backed securities ("SMBS") and commercial mortgage-backed securities ("CMBS"). Mortgage pass-through securities provide for monthly payments that are a "pass-through" of the monthly interest and principal payments made by the individual borrowers on the pooled mortgage loans. CMOs are debt obligations collateralized by mortgage loans or mortgage pass-through securities (collectively "Mortgage Assets"). CMOs are issued in multiple classes and each class has a fixed or floating rate and a stated maturity (when a debt security provides its final payment) or final distribution date. Certain classes will have more predictable cash flows than others. The Fund may invest in any class of CMO. SMBS are derivative multi-class mortgage-backed securities. A common type of SMBS will have one class receiving some of the interest and most of the principal from the Mortgage Assets, while the other class receives most of the interest and the remainder of the principal. In the most extreme case, one class will receive all of the interest (the interest-only or "IO" class), while the other class will receive all of the principal (the principal-only or "PO" class). CMBS are generally multi-class or pass-through securities backed by a mortgage loan or a pool of mortgage loans secured by commercial property, such as industrial and warehouse properties, office buildings, retail space and shopping malls, multifamily properties and cooperative apartments. In addition, the Fund may invest in to-be-announced pass-through mortgage-backed securities, which settle on a delayed delivery basis ("TBAs").

Asset-backed securities represent an interest in a pool of assets such as, but not limited to, automobile loans, credit card receivables, student loans or home equity (prime and subprime) loans that have been securitized in pass-through structures similar to mortgage-backed securities.

The Fund may invest in fixed-income securities issued or guaranteed by the U.S. Government, its agencies or instrumentalities or in fixed-income securities issued or guaranteed by foreign governments or supranational organizations or any of their instrumentalities, including debt obligations of governmental issuers located in emerging market or developing countries and sovereign debt. The Fund may also invest generally in foreign securities that are denominated in U.S. dollars or in currencies other than U.S. dollars.

In pursuit of its investment objectives, the Fund may regularly enter into currency derivatives, including, but not limited to, foreign currency forward exchange contracts, and currency and currency index futures and options contracts for hedging and non-hedging purposes. The use of these currency derivatives may allow the Fund to obtain net long or net negative (short) exposure to selected currencies. At times, the Fund may enter into "cross-currency" transactions involving currencies other than those in which securities held or proposed to be purchased are denominated.

In addition to its use of currency derivatives, the Fund may, but it is not required to, use derivatives and similar instruments for a variety of purposes, including hedging, risk management, portfolio management or to earn income. The Fund's use of derivatives may involve the purchase and sale of derivative instruments such as futures, options, swaps and other similar instruments and techniques. These derivative instruments will be counted toward the Fund's 80% policy discussed above to the extent they have economic characteristics similar to the securities included within that policy.

The Fund may invest up to 20% of its net assets in loan-related investments, such as public bank loans made by banks or other financial institutions and loan participations and assignments, which may be rated investment grade or below investment grade. The Fund may also invest in restricted and illiquid securities.

**3**

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Morgan Stanley Prospectus \| **Fund Summary**

Global Fixed Income Opportunities Fund (Con't)

**Principal Risks**

There is no assurance that the Fund will achieve its investment objective, and you can lose money investing in this Fund. The principal risks of investing in the Fund include:

• **Fixed-Income Securities.** Fixed-income securities are subject to the risk of the issuer's inability to meet principal and interest payments on its obligations (i.e., credit risk) and are subject to price volatility resulting from, among other things, interest rate sensitivity (i.e., interest rate risk), market perception of the creditworthiness of the issuer and general market liquidity (i.e., market risk). For example, a type of fixed-income securities in which the Fund may invest are corporate debt obligations. In addition to interest rate, credit and other risks, corporate debt obligations are also subject to factors directly related to the issuer, such as the credit rating of the corporation, the corporation's performance and perceptions of the corporation in the marketplace, and by factors not directly related to the issuer, such as general market liquidity, economic conditions and inflation. The Fund may face a heightened level of interest rate risk in times of monetary policy change and/or uncertainty, such as when the Federal Reserve Board adjusts a quantitative easing program and/or changes rates. A changing interest rate environment increases certain risks, including the potential for periods of volatility, increased redemptions, shortened durations (i.e., prepayment risk) and extended durations (i.e., extension risk). The Fund is not limited as to the maturities (when a debt security provides its final payment) or durations (measure of interest rate sensitivity) of the securities in which it may invest. Securities with longer durations are likely to be more sensitive to changes in interest rates, generally making them more volatile than securities with shorter durations. Lower rated fixed-income securities have greater volatility because there is less certainty that principal and interest payments will be made as scheduled. To the extent that the Fund invests in convertible securities, and the convertible security's investment value is greater than its conversion value, its price will be likely to increase when interest rates fall and decrease when interest rates rise. If the conversion value exceeds the investment value, the price of the convertible security will tend to fluctuate directly with the price of the underlying security. The Fund may be subject to certain liquidity risks that may result from the lack of an active market and the reduced number and capacity of traditional market participants to make a market in fixed-income securities.

• **Credit and Interest Rate Risk.** Credit risk refers to the possibility that the issuer or guarantor of a security will be unable or unwilling or perceived to be unable or unwilling to make interest payments and/or repay the principal on its debt. In such instances, the value of the Fund could decline and the Fund could lose money. Interest rate risk refers to the decline in the value of a fixed-income security resulting from changes in the general level of interest rates. When the general level of interest rates goes up, the prices of most fixed-income securities go down. When the general level of interest rates goes down, the prices of most fixed-income securities go up. The Fund may invest in variable and floating rate loans and other variable and floating rate securities. Although these instruments are generally less sensitive to interest rate changes than fixed rate instruments, the value of variable and floating rate loans and other securities may decline if their interest rates do not rise as quickly, or as much, as general interest rates. The Fund may face a heightened level of interest rate risk in times of monetary policy change and/or uncertainty, such as when the Federal Reserve Board adjusts a quantitative easing program and/or changes rates. A changing interest rate environment increases certain risks, including the potential for periods of volatility, increased redemptions, shortened durations (i.e., prepayment risk) and extended durations (i.e., extension risk). During periods when interest rates are low, the Fund's yield (and total return) also may be low or otherwise adversely affected or the Fund may be unable to maintain positive returns. Credit ratings may not be an accurate assessment of liquidity or credit risk. Although credit ratings may not accurately reflect the true credit risk of an instrument, a change in the credit rating of an instrument or an issuer can have a rapid, adverse effect on the instrument's liquidity and make it more difficult for the Fund to sell at an advantageous price or time.

• **Foreign and Emerging Market Securities.** Investments in foreign markets entail special risks such as currency, political (including geopolitical), economic and market risks. There also may be greater market volatility, less reliable financial information, less stringent investor protections and disclosure standards, higher transaction and custody costs, decreased market liquidity and less government and exchange regulation associated with investments in foreign markets. In addition, investments in certain foreign markets that have historically been considered stable may become more volatile and subject to increased risk due to ongoing developments and changing conditions in such markets. Moreover, the growing interconnectivity of global economies and financial markets has increased the probability that adverse developments and conditions in one country or region will affect the stability of economies and financial markets in other countries or regions. Certain foreign markets may rely heavily on particular industries or foreign capital and are more vulnerable to diplomatic developments, the imposition of economic sanctions against a particular country or countries, organizations, companies, entities and/or individuals, changes in international trading patterns, trade barriers and other protectionist or retaliatory measures. Investments in foreign markets may also be adversely affected by governmental actions such as the imposition of capital controls, nationalization of companies or industries, expropriation of assets or the imposition of punitive taxes. The governments of certain countries may prohibit or impose substantial restrictions on foreign investing in their capital markets or in certain sectors or industries. In addition, a foreign government may limit or cause delay in the convertibility or repatriation of its currency which would adversely affect the U.S. dollar value and/or liquidity of investments denominated in that currency. Certain foreign investments may become less liquid in response to market developments or adverse investor perceptions, or become illiquid after purchase by the Fund, particularly during periods of market turmoil. When the Fund holds illiquid investments, its portfolio may be harder to value. The risks of investing in emerging market countries are greater than the risks associated with investments in foreign developed countries. Certain emerging market countries may be subject to less stringent requirements regarding accounting, auditing, financial reporting and record keeping and

**4**

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Morgan Stanley Prospectus \| **Fund Summary**

Global Fixed Income Opportunities Fund (Con't)

therefore, material information related to an investment may not be available or reliable. Certain emerging market or developing countries are among the largest debtors to commercial banks and foreign governments. The issuer or governmental authority that controls the repayment of sovereign debt may not be willing or able to repay the principal and/or pay interest when due in accordance with the terms of such obligations. In addition, foreign governments may default on their debt securities, which may require holders of such securities to participate in debt rescheduling or additional lending to defaulting governments. Moreover, there is no bankruptcy proceeding by which defaulted sovereign debt may be collected in whole or in part. In addition, the Fund is limited in its ability to exercise its legal rights or enforce a counterparty's legal obligations in certain jurisdictions outside of the United States, in particular, in emerging markets countries. In addition, the Fund's investments in foreign issuers may be denominated in foreign currencies and therefore, to the extent unhedged, the value of those investments will fluctuate with U.S. dollar exchange rates. To the extent hedged by the use of foreign currency forward exchange contracts, the precise matching of the foreign currency forward exchange contract amounts and the value of the securities involved will not generally be possible because the future value of such securities in foreign currencies will change as a consequence of market movements in the value of those securities between the date on which the contract is entered into and the date it matures. There is additional risk that such transactions may reduce or preclude the opportunity for gain if the value of the currency should move in the direction opposite to the position taken and that foreign currency forward exchange contracts create exposure to currencies in which the Fund's securities are not denominated. The use of foreign currency forward exchange contracts involves the risk of loss from the insolvency or bankruptcy of the counterparty to the contract or the failure of the counterparty to make payments or otherwise comply with the terms of the contract. Economic sanctions or other similar measures may be, and have been, imposed against certain countries, organizations, companies, entities and/or individuals. Economic sanctions and other similar measures could, among other things, effectively restrict or eliminate the Fund's ability to purchase or sell securities, negatively impact the value or liquidity of the Fund's investments, significantly delay or prevent the settlement of the Fund's securities transactions, force the Fund to sell or otherwise dispose of investments at inopportune times or prices, or impair the Fund's ability to meet its investment objective or invest in accordance with its investment strategies.

• **Mortgage-Backed Securities.** Mortgage-backed securities entail prepayment risk, which generally increases during a period of falling interest rates. Rising interest rates tend to discourage refinancings, with the result that the average life and volatility of mortgage-backed securities will increase and market price will decrease. Rates of prepayment, faster or slower than expected by the Adviser, could reduce the Fund's yield, increase the volatility of the Fund and/or cause a decline in NAV. Mortgage-backed securities are also subject to extension risk, which is the risk that rising interest rates could cause mortgages or other obligations underlying the securities to be prepaid more slowly than expected, thereby lengthening the duration of such securities, increasing their sensitivity to interest rate changes and causing their prices to decline. Certain mortgage-backed securities may be more volatile and less liquid than other traditional types of debt securities. In addition, mortgage-backed securities are subject to credit risk. The Fund may invest in non-agency mortgage-backed securities offered by non-governmental issuers, such as commercial banks, savings and loan institutions, private mortgage insurance companies, mortgage bankers and other secondary market issuers. Non-agency mortgage-backed securities are not subject to the same underwriting requirements for the underlying mortgages that are applicable to those mortgage-backed securities that have a government or government-sponsored entity guarantee. As a result, the mortgage loans underlying non-agency mortgage-backed securities may, and frequently do, have less favorable collateral, credit risk or other underwriting characteristics than government or government-sponsored mortgage-backed securities and have wider variances in a number of terms including interest rate, term, size, purpose and borrower characteristics. An unexpectedly high rate of defaults on the mortgages held by a mortgage pool may adversely affect the value of a mortgage-backed security and could result in losses to the Fund. The risk of such defaults is generally higher in the case of mortgage pools that include subprime mortgages. Furthermore, mortgage-backed securities may be subject to risks associated with the assets underlying those securities, such as a decline in value. Investments in mortgage-backed securities may give rise to a form of leverage (indebtedness) and may cause the Fund's portfolio turnover rate to appear higher. Leverage may cause the Fund to be more volatile than if the Fund had not been leveraged. The risks associated with mortgage-backed securities typically become elevated during periods of distressed economic, market, health and labor conditions. In particular, increased levels of unemployment, delays and delinquencies in payments of mortgage and rent obligations, and uncertainty regarding the effects and extent of government intervention with respect to mortgage payments and other economic matters may adversely affect the Fund's investments in mortgage-backed securities.

• **CMOs.** CMOs are comprised of various tranches, the expected cash flows of which have varying degrees of predictability as compared with the underlying Mortgage Assets. The less predictable the cash flow, the higher the yield and the greater the risk. In addition, if the collateral securing CMOs or any third-party guarantees is insufficient to make payments, the Fund could sustain a loss.

• **SMBS.** Investments in each class of SMBS are extremely sensitive to changes in interest rates. IOs tend to decrease in value substantially if interest rates decline and prepayment rates become more rapid. POs tend to decrease in value substantially if interest rates increase and the rate of prepayment decreases. If the Fund invests in SMBS and interest rates move in a manner not anticipated by Fund management, it is possible that the Fund could lose all or substantially all of its investment.

• **Commercial Mortgage-Backed Securities.** CMBS are subject to credit risk and prepayment risk. Although prepayment risk is present, it is of a lesser degree in the CMBS market than in the residential mortgage market; commercial real estate property loans

**5**

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Morgan Stanley Prospectus \| **Fund Summary**

Global Fixed Income Opportunities Fund (Con't)

often contain provisions which substantially reduce the likelihood that such securities will be prepaid (e.g., significant prepayment penalties on loans and, in some cases, prohibition on principal payments for several years following origination).

• **When-Issued Securities, Delayed Delivery Securities, TBAs and Forward Commitments.** The Fund may purchase or sell securities that it is entitled to receive on a when-issued, delayed delivery or through a forward commitment basis. For example, the Fund may invest in TBAs, which settle on a delayed delivery basis. These investments may result in a form of leverage and may increase volatility in the Fund's share price. In a TBA transaction, the seller agrees to deliver the MBS for an agreed upon price on an agreed upon future date, but makes no guarantee as to which or how many securities are to be delivered. Accordingly, the Fund's investments in TBAs are subject to risks such as failure of the counterparty to perform its obligation to deliver the security, the characteristics of a security delivered to the Fund may be less favorable than expected and the security the Fund buys will lose value prior to its delivery. The Fund's purchase of other securities on a when-issued, delayed delivery or through a forward commitment basis are subject to similar risks. When the Fund has sold a security on a when-issued, delayed delivery, or forward commitment basis, the Fund does not benefit if the value of the security appreciates above the sale price during the commitment period and the Fund is subject to failure of the counterparty to pay for the securities.

• **Asset-Backed Securities.** Asset-backed securities are subject to credit (such as a borrower's default on its mortgage obligation and the default or failure of a guarantee underlying the asset-backed security), interest rate and certain additional risks, including the risk that various federal and state consumer laws and other legal and economic factors may result in the collateral backing the securities being insufficient to support payment on the securities. Some asset-backed securities also entail prepayment risk and extension risk, which may vary depending on the type of asset. Due to these risks, asset-backed securities may become more volatile in certain interest rate environments.

• **High Yield Securities ("Junk Bonds").** The Fund's investments in high yield securities expose it to a substantial degree of credit risk. Investing in emerging markets intensifies risk, because high yield securities may be more volatile in price in certain environments. High yield securities may be issued by companies that are restructuring, are smaller and less creditworthy or are more highly indebted than other companies, and therefore they may have more difficulty making scheduled payments of principal and interest. High yield securities are subject to greater risk of loss of income and principal than higher rated securities and may be considered speculative. High yield securities may experience reduced liquidity, and sudden and substantial decreases in price. An economic downturn affecting an issuer of high yield securities may result in an increased incidence of default. In the event of a default, the Fund may incur additional expenses to seek recovery.

• **Market and Geopolitical Risk.** The value of your investment in the Fund is based on the values of the Fund's investments, which may change due to economic and other events that affect markets generally, as well as those that affect particular regions, countries, industries, companies or governments. These events may be sudden and unexpected, and could adversely affect the liquidity of the Fund's investments, which may in turn impact valuation, the Fund's ability to sell securities and/or its ability to meet redemptions. The risks associated with these developments may be magnified if certain social, political, economic and other conditions and events (such as war, natural disasters, epidemics and pandemics, terrorism, conflicts, social unrest, recessions, inflation, rapid interest rate changes and supply chain disruptions) adversely interrupt the global economy and financial markets. It is difficult to predict when events affecting the U.S. or global financial markets may occur, the effects that such events may have and the duration of those effects (which may last for extended periods). These events may negatively impact broad segments of businesses and populations and have a significant and rapid negative impact on the performance of the Fund's investments, adversely affect and increase the volatility of the Fund's share price and exacerbate pre-existing risks to the Fund.

• **U.S. Government Securities.** Different types of U.S. government securities are subject to different levels of credit risk, including the risk of default, depending on the nature of the particular government support for that security. For example, a U.S. government- sponsored entity, such as Federal National Mortgage Association or Federal Home Loan Mortgage Corporation, although chartered or sponsored by an Act of Congress, may issue securities that are neither insured nor guaranteed by the U.S. Treasury and, therefore, are not backed by the full faith and credit of the United States. With respect to U.S. government securities that are not backed by the full faith and credit of the United States, there is the risk that the U.S. Government will not provide financial support to such U.S. government agencies, instrumentalities or sponsored enterprises if it is not obligated to do so by law.

• **Sovereign Debt Securities.** Investing in sovereign debt securities will expose the Fund to the direct or indirect consequences of political, social or economic changes in the countries that issue the securities. The issuer or governmental authority that controls the repayment of sovereign debt may not be willing or able to repay the principal and/or pay interest when it becomes due, due to factors such as debt service burden, political constraints, cash flow problems and other national economic factors. In addition, foreign governments may default on their debt securities, which may require holders of such securities to participate in debt rescheduling or additional lending to defaulting governments. Moreover, there is no bankruptcy proceeding by which defaulted sovereign debt may be collected in whole or in part.

• **Currency Derivatives.** Investments in currency derivatives may substantially change the Fund's exposure to currency exchange rates and could result in losses to the Fund if currencies do not perform as the Adviser and/or Sub-Adviser expect. Foreign currency forward exchange contracts and currency futures and options contracts create exposure to currencies in which the Fund's securities are not denominated. To the extent hedged by the use of foreign currency forward exchange contracts, the precise matching of the

**6**

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Morgan Stanley Prospectus \| **Fund Summary**

Global Fixed Income Opportunities Fund (Con't)

foreign currency forward exchange contract amounts and the value of the securities involved will not generally be possible because the future value of such securities in foreign currencies will change as a consequence of market movements in the value of those securities between the date on which the contract is entered into and the date it matures. There is additional risk that such transactions may reduce or preclude the opportunity for gain if the value of the currency should move in the direction opposite to the position taken and that foreign currency forward exchange contracts create exposure to currencies in which the Fund's securities are not denominated. The use of foreign currency forward exchange contracts involves the risk of loss from the insolvency or bankruptcy of the counterparty to the contract or the failure of the counterparty to make payments or otherwise comply with the terms of the contract.

• **Loan-Related Investments.** In addition to risks generally associated with debt investments, loan-related investments, such as public bank loans and loan participations and assignments, are subject to other risks. Such investments may be subject to additional risks including subordination to other creditors, no collateral or limited rights in collateral, lack of a regular trading market, extended settlement periods, liquidity risks, prepayment risks, potentially less protection under the federal securities laws and lack of publicly available information.  Bank loans are subject to the risk of default in the payment of interest or principal on a loan, which will result in a reduction of income to the Fund, and a potential decrease in the Fund's NAV. The risk of default will increase in the event of an economic downturn or a substantial increase in interest rates. Because public bank loans usually rank lower in priority of payment to senior loans, they present a greater degree of investment risk. These bank loans may exhibit greater price volatility as well.

• **Liquidity.** The Fund may make investments that are illiquid or restricted or that may become illiquid or less liquid in response to overall economic conditions or adverse investor perceptions, and which may entail greater risk than investments in other types of securities. These investments may be more difficult to value or sell, particularly in times of market turmoil, and there may be little trading in the secondary market available for particular securities. Liquidity risk may be magnified in a market where credit spread and interest rate volatility is rising and where investor redemptions from fixed-income mutual funds may be higher than normal. If the Fund is forced to sell an illiquid or restricted security to fund redemptions or for other cash needs, it may be forced to sell the security at a loss or for less than its fair value.

• **Derivatives.** Derivatives and other similar instruments often have risks similar to those of the underlying asset or instrument, including market risk, and may have additional risks, including imperfect correlation between the value of the derivative and the underlying asset, risks of default by the counterparty to certain transactions, magnification of losses incurred due to changes in the market value of the securities, instruments, indices or interest rates to which the derivative instrument relates, risks that the transactions may not be liquid, risks arising from margin and payment requirements, risks arising from mispricing or valuation complexity and operational and legal risks. Certain derivative transactions may give rise to a form of leverage. Leverage magnifies the potential for gain and the risk of loss.

• **Portfolio Turnover.** Consistent with its investment policies, the Fund will purchase and sell securities without regard to the effect on portfolio turnover. Higher portfolio turnover will cause the Fund to incur additional transaction costs.

• **Active Management Risk.** In pursuing the Fund's investment objective, the Adviser has considerable leeway in deciding which investments to buy, hold or sell on a day-to-day basis, and which trading strategies to use. For example, the Adviser, in its discretion, may determine to use some permitted trading strategies while not using others. The success or failure of such decisions will affect the Fund's performance.

Shares of the Fund are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.

**Past Performance**

The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's Class A shares' performance from year-to-year and by showing how the Fund's average annual returns for the past one, five and 10 year periods and since inception compare with those of a broad measure of market performance, as well as an index that represents a group of similar mutual funds, over time. The performance of the other classes, which is shown in the table below, will differ because the classes have different ongoing fees. The performance information in the bar chart does not reflect the deduction of sales charges; if these amounts were reflected, returns would be less than shown. The Fund's returns in the table include the maximum applicable sales charge for Class A and Class C and assume you sold your shares at the end of each period (unless otherwise noted). The Fund's past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available online at www.morganstanley.com/im or by calling toll-free 1-800-869-6397.

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Morgan Stanley Prospectus \| **Fund Summary**

Global Fixed Income Opportunities Fund (Con't)

**Annual Total Returns—Calendar Years**

![](sp15659img001.jpg)

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| | | |
|:---|:---|:---|
| **High Quarter** | 06/30/20 | 8.25% |
| **Low Quarter** | 03/31/20 | -7.86% |

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**Average Annual Total Returns** <br>(for the calendar periods ended December 31, 2022)

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **Past 1**<br>**Year** | **Past 5**<br>**Years** | **Past 10**<br>**Years** | **Since Inception** |
| **Class A<sup>1</sup>** |  |  |  |  |
| Return Before Taxes | -10.27% | 0.54% | 2.03% | 3.39% |
| Return After Taxes on Distributions<sup>2</sup> | -12.22% | -1.08% | 0.42% | 1.17% |
| Return After Taxes on Distributions and Sale of Fund Shares | -6.07% | -0.25% | 0.85% | 1.58% |
| **Class L<sup>1</sup>** |  |  |  |  |
| Return Before Taxes | -7.51% | 0.96% | 2.09% | 3.03% |
| **Class I<sup>1</sup>** |  |  |  |  |
| Return Before Taxes | -7.05% | 1.51% | 2.67% | 3.81% |
| **Class C<sup>1</sup>** |  |  |  |  |
| Return Before Taxes | -8.83% | 0.47% | N/A | 1.17% |
| **Class R6<sup>1</sup>** |  |  |  |  |
| Return Before Taxes | -6.98% | 1.58% | N/A | 3.15% |
| Bloomberg Global Aggregate (Hedged USD) Index (reflects no deduction for fees, expenses or taxes)<sup>3</sup> | -11.22% | 0.36% | 1.70% | 4.19%<sup>4</sup> |
| Global Fixed Income Opportunities Blend Index (reflects no deduction for fees, expenses and taxes)<sup>5</sup> | -11.22% | 0.36% | 0.16% | 3.62%<sup>4</sup> |
| Lipper Global Income Funds Index (reflects no deduction for taxes)<sup>6</sup> | -12.46% | -0.16% | 0.80% | 3.65%<sup>4</sup> |

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1 Class A, L and I shares commenced operations on July 28, 1997. Class R6 shares commenced operations on September 13, 2013 and Class C shares commenced operations on April 30, 2015. Effective April 29, 2022, Class IS shares were renamed Class R6 shares.

2 These returns do not reflect any tax consequences from a sale of your shares at the end of each period, but they do reflect any applicable sales charges on such a sale.

3 The Bloomberg Global Aggregate (Hedged USD) Index provides a broad-based measure of the global investment grade fixed-rate debt markets. Currency exposure is hedged to the U.S. dollar. It is not possible to invest directly in an index.

4 Since Inception reflects the inception date of Class A shares.

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| | |
|:---|:---|
| 5 | The Global Fixed Income Opportunities Blend Index is a performance linked benchmark of the old benchmark represented by Bloomberg Global Aggregate Index (unhedged USD) (a benchmark that provides a broad-based measure of the global investment grade fixed rate debt markets with returns in unhedged USD) from the Fund's inception to December 31, 2016 to the new benchmark represented by Bloomberg Global Aggregate (Hedged USD) Index for periods thereafter. It is not possible to invest directly in an index. |

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6 The Lipper Global Income Funds Index is an equally weighted performance index of the largest qualifying funds (based on net assets) in the Lipper Global Income Funds classification. There are currently 30 funds represented in this Index.

The after-tax returns shown in the table above are calculated using the historical highest individual federal marginal income tax rates during the period shown and do not reflect the impact of state and local taxes. After-tax returns for the Fund's other classes will vary from the Class A shares' returns. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts ("IRAs"). After-tax returns may be higher than before-tax returns due to foreign tax credits and/or an

**8**

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Morgan Stanley Prospectus \| **Fund Summary**

Global Fixed Income Opportunities Fund (Con't)

assumed benefit from capital losses that would have been realized had Fund shares been sold at the end of the relevant periods, as applicable.

**Fund Management**

**Adviser.** Morgan Stanley Investment Management Inc.

**Sub-Adviser.** Morgan Stanley Investment Management Limited ("MSIM Limited" or the "Sub-Adviser").

**Portfolio Managers.** The Fund is managed by members of the Fixed Income team. Information about the current members jointly and primarily responsible for the day-to-day implementation of the Fund's overall strategy and portfolio construction is shown below:

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| | | |
|:---|:---|:---|
| **Name** | **Title with Adviser/Sub-Adviser** | **Date Began**<br>**Managing Fund** |
| Richard Ford | Managing Director | October 2014 |
| Michael Kushma | Managing Director | April 2014 |
| Christian G. Roth | Managing Director | March 2010 |
| Leon Grenyer | Managing Director of MSIM Limited | October 2022 |
| Utkarsh Sharma | Executive Director | August 2020 |

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**Purchase and Sale of Fund Shares**

*The Fund has suspended offering Class L shares of the Fund for sale to all investors. The Class L shareholders of the Fund do not have the option of purchasing additional Class L shares. However, the existing Class L shareholders may invest in additional Class L shares through reinvestment of dividends and distributions.*

The minimum initial investment generally is $1 million for Class I shares and $1,000 for each of Class A and Class C shares of the Fund. To purchase Class R6 shares, an investor must meet a minimum initial investment of $5 million or be a defined contribution, defined benefit or other employer sponsored employee benefit plan, in each case provided that the plan trades through an intermediary that combines its clients' assets in a single omnibus account, whether or not such plan is qualified under the Internal Revenue Code of 1986, as amended (the "Code"), and in each case subject to the discretion of the Adviser. The minimum investment requirements may be waived for certain investments. For more information, please refer to the section of the Prospectus entitled "Shareholder Information—How to Buy Shares—Minimum Investment Amounts."

You can purchase or sell Fund shares on any day the New York Stock Exchange ("NYSE") is open for business directly from the Fund by mail (c/o SS&C Global Investor and Distribution Solutions, Inc., P.O. Box 219804, Kansas City, MO 64121-9804), by telephone (1-800-869-6397) or by contacting your Morgan Stanley Financial Advisor or an authorized third-party, such as a broker-dealer or other financial intermediary that has entered into a selling agreement with the Fund's "Distributor," Morgan Stanley Distribution, Inc. (each, a "Financial Intermediary"). In addition, you can sell Fund shares at any time by enrolling in a systematic withdrawal plan. Your shares will be sold at the next price calculated after we receive your order to redeem. If you sell Class A or Class C shares, your net sale proceeds are reduced by the amount of any applicable CDSC. For more information, please refer to the sections of the Prospectus entitled "Shareholder Information—How To Buy Shares" and "—How To Sell Shares."

**Tax Information**

The Fund intends to make distributions that may be taxed as ordinary income or capital gains, unless you are investing through a tax-deferred arrangement, such as a 401(k) plan or an IRA.

**Payments to Broker-Dealers and Other Financial Intermediaries**

If you purchase Fund shares through a Financial Intermediary (such as a bank), the Adviser and/or the Distributor may pay the Financial Intermediary for the sale of Fund shares and related services. These payments, which may be significant in amount, may create a conflict of interest by influencing the Financial Intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your Financial Intermediary's web site for more information.

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