# Investment Grade Credit Rating: What Does It Mean?

> **Definition**
>
> An investment grade credit rating is a rating that indicates that a bond has a relatively low risk of default.

## What Is Investment Grade?

An investment grade is a rating that signifies a municipal or corporate bond presents a relatively low risk of [default](https://www.investopedia.com/terms/d/default2.asp). Bond rating firms like Standard & Poor’s (S&P), Moody's, and Fitch use different designations, consisting of the upper- and lower-case letters "A" and "B," to identify a bond's credit quality rating. "AAA" and "AA" (high credit quality) and "A" and "BBB" (medium credit quality) are considered investment grade. [Credit ratings](https://www.investopedia.com/terms/c/creditrating.asp) for bonds below these designations ("BB," "B," "CCC," etc.) are considered low credit quality and are commonly referred to as [junk bonds](https://www.investopedia.com/terms/j/junkbond.asp).

### Key Takeaways

  

*   Investment grade refers to a credit rating assigned to bonds, which indicates a low risk of default
*   Different bond rating agencies have different rating symbols to signify investment grade bonds.
*   Investors and analysts commonly look at grades from rating agencies like Standard & Poor's, Moody's, and Fitch.
*   All else being equal, investment grade bonds will generally have lower returns than junk bonds due to them having theoretically less risk.

![Investment Grade](https://www.investopedia.com/thmb/E96QhUriav03ug5wAsU8t7vkuW8=/1500x0/filters:no_upscale():max_bytes(150000):strip_icc()/TermDefinitions_investmentgrade-v2-0100645a6589489dbe83e5213cec2ace.jpg)

*Agencies like S&P, Moody's, and Fitch assign these ratings using a system of letter grades. — Investopedia / Tara Anand*

## How Investment Grade Works

Individuals and businesses are given credit ratings based on their [credit histories](https://www.investopedia.com/terms/c/credit-history.asp). Lenders use these ratings to decide whether they will do business with and extend credit to potential borrowers. Similarly, investments are given credit ratings that lenders and investors can use to determine whether they want to invest in them.

Grades work just like [credit scores](https://www.investopedia.com/terms/c/credit_score.asp) for consumers and companies. An investment grade credit rating indicates a low risk of a credit default, making it an attractive investment vehicle, especially for conservative investors. A speculative grade, on the other hand, is the opposite of an investment grade. This grade indicates that the investment comes with a greater degree of [risk](https://www.investopedia.com/terms/r/risk.asp).

Ratings are given to investments by different agencies, including S&P, Moody's, and Fitch. How they are rated varies based on the agency. For instance:

*   [S&P](https://www.investopedia.com/terms/s/sp.asp) hands out letter grades with plus (+) and minus (-) suffixes. Triple-letter ratings are higher, followed by double-letter ratings, then single-letter ratings.
*   [Moody's](https://www.investopedia.com/terms/m/moodys.asp) rates investments with triple-letter ratings as the highest, followed by those with a combination of letters and numbers.
*   The [Fitch rating scale](https://www.investopedia.com/terms/f/fitch-ratings.asp) is similar to that of S&P's  
    

We go into more detail on these ratings and their scales below.

## Special Considerations

Investors should note that U.S. [government bonds](https://www.investopedia.com/terms/g/government-bond.asp), also known as Treasuries, are generally granted the highest possible credit quality rating. In the case of municipal and corporate [bond funds](https://www.investopedia.com/terms/b/bondfund.asp), a [fund company's](https://www.investopedia.com/terms/f/fund_company.asp) literature, such as its fund prospectus and independent investment research reports, reports an "average credit quality" for the fund's portfolio as a whole.

In August 2023, Fitch downgraded the credit rating for the United States, moving it from a AAA rating to AA+. The agency cited potential issues with the country's fiscal condition over the next three years because of the political climate. According to Fitch,

> "The repeated debt-limit political standoffs and last-minute resolutions have eroded confidence in fiscal management."

Fitch also stated that shocks to the economy related to tax cuts and increased government spending are raising the [national debt](https://www.investopedia.com/updates/usa-national-debt/), which could be problematic for the country's ability to pay its bills.

> **Important**
>
> Many institutional investors have a rigid policy of limiting their bond investments solely to investment grade issues.

## Investment Grade Credit Rating Details

Investment grade issuer credit ratings are those rated at least BBB- (S&P, Fitch) or Baa3 (Moody's). The exact ratings depend on the [credit rating agency](https://www.investopedia.com/articles/bonds/09/history-credit-rating-agencies.asp).

### Standard & Poor's (S&P)

Investment grade credit ratings include:

*   AAA
*   AA+
*   AA
*   AA-  
    

Companies with any credit rating in this category boast a high capacity to repay their loans; however, those awarded a AAA rating stand at the top of the heap and are deemed to have the highest capacity of all to repay loans.

The next category down includes the following ratings:

*   A+
*   A
*   A-

Companies with these ratings are considered to be stable entities with robust capacities for repaying their financial commitments. However, such companies may encounter challenges during deteriorating economic conditions.

The bottom tier of investment grade credit ratings delivered by Standard and Poor's include:

*   BBB+
*   BBB
*   BBB-  
    

Companies with these ratings are widely considered to be speculative grade and are even more vulnerable to changing economic conditions than the prior group. Nevertheless, these companies largely demonstrate the ability to meet their debt payment obligations.

### Moody's

According to Moody's, investment grade bonds comprise the following credit ratings:

*   Aaa
*   Aa1
*   Aa2
*   Aa3
*   A1
*   A2
*   A3
*   Baa1
*   Baa2
*   Baa3  
    

The highest-rated Aaa bonds possess the least [credit risk](https://www.investopedia.com/terms/c/creditrisk.asp) of a company's potential failure to repay loans. By contrast, the mid-tier Baa-rated companies may still have [speculative](https://www.investopedia.com/terms/s/speculation.asp) elements, presenting high credit risk—especially those companies that paid debt with expected future cash flows that failed to materialize as projected.

### Fitch

As noted above, Fitch ratings are similar to those issued by S&P. Investment grade ratings are as follows:

## Downgrading From Investment Grade

Investors should be aware that an agency [downgrade](https://www.investopedia.com/terms/d/downgrade.asp) of a company's bonds from "BBB"' to "BB" reclassifies its debt from investment grade to junk status. Although this is merely a one-step drop in credit rating, the repercussions can be severe.

The drop to junk status telegraphs that a company may struggle to pay its debts. The downgraded status can make it even more difficult for companies to source financing options, causing a downward spiral as costs of capital increase.

## What Is Investment Grade vs. High Yield?

High yield bonds are generally considered higher risk than investment grade bonds. High yield bonds, however, tend to offer a higher return—to compensate for the higher risk of default of the issuer.  

## What Is Considered Investment Grade?

Investment grade is considered to be rated BBB- or higher for Fitch and S&P Global. Investment grade for Moody’s is considered Baa3 or higher.

## What Are AAA Bonds?

Bonds that are rated AAA have the highest possible rating. The issuers of these bonds have the highest creditworthiness and are expected to easily meet financial obligations. AAA bonds have the lowest risk of default.

## The Bottom Line

Credit ratings help banks, lenders, and financial institutions decide how likely consumers and businesses are to repay their debts using credit scores. Similarly, investors can determine whether to put their money into certain investments based on ratings by agencies like S&P, Moody's, and Fitch. The higher the grade, the safer the investment. Investments with lower ratings have a greater risk of default. Keep in mind that ratings can go up and down based on financial and economic conditions, so it's always a good idea to keep up-to-date with the news and your portfolio.

> **Article Sources**
>
> 1.  Fidelity. "[Bond Ratings](https://www.fidelity.com/learning-center/investment-products/fixed-income-bonds/bond-ratings)."
>     
> 2.  Fidelity. "[Bond Ratings](https://www.fidelity.com/learning-center/investment-products/fixed-income-bonds/bond-ratings)."
>     
> 3.  Fitch Ratings. "[Fitch Downgrades the United States' Long-Term Ratings to 'AA+' from 'AAA'; Outlook Stable](https://www.fitchratings.com/research/sovereigns/fitch-downgrades-united-states-long-term-ratings-to-aa-from-aaa-outlook-stable-01-08-2023)."
>     
> 4.  The Organization for Economic Cooperation and Development. "[Corporate Bond Market Trends, Emerging Risks and Monetary Policy](https://www.oecd.org/corporate/ca/Corporate-Bond-Market-Trends-Emerging-Risks-Monetary-Policy.pdf)." Page 13.
>     
> 5.  S&P Global. "[S&P Global Ratings Definitions](https://www.standardandpoors.com/en_US/web/guest/article/-/view/sourceId/504352)."
>     
> 6.  Moody's Investor Service. "[What Is a Credit Rating?](https://ratings.moodys.io/ratings)"
>     
> 7.  Fitch Ratings. "[Rating Definitions](https://www.fitchratings.com/products/rating-definitions)."
>     
> 8.  Financial Industry Regulatory Authority. "[What To Know Before Saying Hi to High-Yield Bonds](https://www.finra.org/investors/insights/what-to-know-high-yield-bonds)."
>     
> 9.  U.S. Securities and Exchange Commission. "[Updated Investor Bulletin: the ABCs of Credit Ratings](https://www.sec.gov/oiea/investor-alerts-and-bulletins/ib_creditratings)."