# EDGAR Filing Document

**Accession Number:** 0000035315
**File Stem:** 0000035315-25-000510
**Filing Date:** 2025-6
**Character Count:** 3362
**Document Hash:** bced58e63111eb9b597bdfa5aeba4956
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000035315-25-000510.hdr.sgml**: 20250606

**ACCESSION NUMBER**: 0000035315-25-000510

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250606

**DATE AS OF CHANGE**: 20250606

**EFFECTIVENESS DATE**: 20250606

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FIDELITY SALEM STREET TRUST
- **CENTRAL INDEX KEY:** 0000035315

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0430

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-41839
- **FILM NUMBER:** 251029350

**BUSINESS ADDRESS:**
- **STREET 1:** 245 SUMMER STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210
- **BUSINESS PHONE:** 617-563-7000

**MAIL ADDRESS:**
- **STREET 1:** 245 SUMMER STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIDELITY FIXED INCOME TRUST
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIDELITY FLEXIBLE BOND FUND
- **DATE OF NAME CHANGE:** 19860904

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIDELITY CORPORATE BOND FUND INC
- **DATE OF NAME CHANGE:** 19851225

## Series and Classes Contracts Data

### Fidelity International Bond Index Fund (Series ID: S000066711)

| Class ID   | Class Name                             | Ticker Symbol   |
|:---|:---|:---|
| C000214977 | Fidelity International Bond Index Fund | FBIIX           |

**Supplement to the Fidelity® International Bond Index Fund March 1, 2025 Summary Prospectus**

Effective September 26, 2025, the following information replaces similar information found in the "Fund Summary" section under the "Principal Investment Strategies" heading.

* Normally investing at least 80% of assets in securities included in the Bloomberg Global Aggregate ex USD ex EM Float Adjusted RIC Diversified Index (Hedged USD).

Bloomberg Global Aggregate ex USD ex EM Float Adjusted RIC Diversified Index (Hedged USD) is a multi-currency benchmark that includes fixed-rate treasury, government-related, corporate and securitized bonds from developed markets issuers while excluding USD denominated debt.

Effective December 11, 2025, derivative instruments that provide investment exposure to the investments above or exposure to one or more market risk factors associated with such investments are included in the fund's 80% policy, consistent with the fund's investment policies and limitations with respect to investments in derivatives.

* Using statistical sampling techniques based on duration, maturity, interest rate sensitivity, security structure, and credit quality to attempt to replicate the returns of the Bloomberg Global Aggregate ex USD ex EM Float Adjusted RIC Diversified Index (Hedged USD) using a smaller number of securities.

Effective September 26, 2025, the following information replaces similar information found in the "Fund Summary" section under the "Principal Investment Risks" heading.

* *Foreign Exposure.*

Foreign markets can be more volatile than the U.S. market due to increased risks of adverse issuer, political, regulatory, market, or economic developments and can perform differently from the U.S. market.

Foreign exchange rates also can be extremely volatile.

IBI-SUSTK-0625-103 1.9900299.103 June 6, 2025