FIBUX Mutual Fund — Fidelity Flex U.S. Bond Index Fund

Fidelity Flex U.S. Bond Index Fund (FIBUX)

FIBUX is a low-cost Mutual Fund that tracks the Bloomberg U.S. Aggregate Bond Index. its distribution rate is 4.20%, its trailing-12-month yield is 4.27%, its expense ratio is 0.00%. Dividend Vision Distribution Safety Score™ is 99/100 (Safe). Total return is 16.3% over the past 9.5 years, 254.8 points behind SPY at 271.1%.

At the current 4.20% distribution rate, a $10,000 investment would generate approximately $420 per year, or $35.00 per month.

Fidelity Flex U.S. Bond Index Fund is a mutual fund that tracks the Bloomberg U.S. Aggregate Bond Index, holding a broad portfolio of investment-grade U.S. bonds including Treasuries, corporate securities, mortgage-backed securities, and asset-backed securities. The fund carries a zero expense ratio and is designed for investors seeking broad exposure to the U.S. bond market with minimal costs. It appeals to fixed-income investors pursuing a diversified, low-cost approach to bond market returns.

FIBUX performance versus SPY

Price and return data through 2026-09-18.

Total return is 16.3% over the past 9.5 years, 254.8 points behind SPY at 271.1%. Over the past year its total return — price change plus distributions reinvested — is -0.5%. Its deepest 1-year drawdown was 3.5%.

FIBUX key facts

Distribution Safety Score™

99 · Safe

Safety-Adjusted Yield

4.16%

Issuer

Fidelity Investments

Asset type

Mutual Fund

Asset class

Fixed Income

Inception date

03/09/2017

Expense ratio

0.00%

Distribution rate

4.20%

Distribution frequency

Monthly

Trailing yield

4.27%

Last close

$8.85 (as of 2026-09-18)

NAV

$8.85

Premium / discount

0.00%

AUM

$4,277,000,000

Average volume

0.0

Last dividend

$0.0321

Last ex-dividend date

08/31/2026

Last payment date

09/01/2026

Beta

1.0

How Dividend Vision calculates yield and returns

Distribution rate (4.20%) is the latest regular payout annualized by the fund's stated frequency, divided by the last close. Issuers often publish this as “Distribution Rate” on the fact sheet. Trailing-12-month yield (4.27%) is the sum of distributions paid in the last 12 months, split-adjusted, divided by the last close. It lags a recent raise or cut. Total return uses split-adjusted close with distributions reinvested on the ex-dividend date (a modeling convention, not the cash-settlement date) from the first stored bar on or after inception through the latest bar, compared with the same window on the benchmark. That is the security's total return, not your personal gain/loss.

Distribution rate methodology · Distribution Safety Score methodology

Sources and review

Primary sources: Fidelity Investments or company page; Index: Bloomberg U.S. Aggregate Bond Index; prices and distributions from Dividend Vision, derived from vendor EOD data.

Reviewed by Bert Sweet, CEO and Co-owner of Dividend Vision. Methodology: Distribution Safety Score.

FIBUX risks and drawbacks

Total return has trailed SPY over the available window. The deepest 1-year drawdown on record here is 3.5%.

Who may consider FIBUX — and who may not

FIBUX may suit someone looking for low-cost broad dividend exposure, a high Distribution Safety Score, moderate current income with a quality tilt. It is a weaker fit for investors hunting double-digit covered-call yields; investors whose main goal is matching SPY total return. This is educational context, not a recommendation to buy or sell.

Frequently asked questions

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