# Fidelity Flex U.S. Bond Index Fund (FIBUX): Mutual Fund Facts & Distributions > Markdown mirror of https://www.dividenddata.com/funds/fibux for AI agents. Same live data as the HTML page, regenerated on the same refresh cycle. Not investment advice. - Issuer: Fidelity · Asset class: Bond - Strategy: Passive Index · Inception: 2017-03-09 This fund aims to replicate the overall performance, encompassing both price appreciation and interest income, of the debt securities included in the Bloomberg U.S. Aggregate Bond Index. Typically, at least 80% of the fund's total assets are dedicated to these specific debt instruments. To achieve efficient index mirroring with a more concentrated portfolio of holdings, the advisor employs statistical sampling. This analytical approach evaluates factors such as bond duration, maturity, interest rate sensitivity, security structure, and credit quality. Furthermore, the fund allocates a porti... ## Key Facts | Metric | Value | |---|---| | Price | $8.87 | | Expense Ratio | 0.00% | | Assets Under Management | $4.27B | | NAV | $8.87 | | Holdings Count | — | | Distribution Yield (TTM) | 4.60% | | Annual Distribution (TTM) | $0.41 /share | | Distribution Frequency | Monthly | | 52-Week Range | $8.70 – $9.36 | | Beta | 1.00 | ## Latest Distribution - Amount: $0.0315 /share - Ex-date: 2026-09-30 - Pay date: 2026-10-01 ## Frequently Asked Questions ### What does FIBUX invest in? This fund aims to replicate the overall performance, encompassing both price appreciation and interest income, of the debt securities included in the Bloomberg U.S. Aggregate Bond Index. Typically, at least 80% of the fund's total assets are dedicated to these specific debt instruments. To achieve efficient index mirroring with a more concentrated portfolio of holdings, the advisor employs statistical sampling. This analytical approach evaluates factors such as bond duration, maturity, interest rate sensitivity, security structure, and credit quality. Furthermore, the fund allocates a portion of its investments to Fidelity's proprietary central funds. ### What is the expense ratio of FIBUX? Fidelity Flex U.S. Bond Index Fund (FIBUX) charges an expense ratio of 0.00%. This is the annual fee deducted from fund assets to cover management and operations. ### What is FIBUX's dividend yield? FIBUX's trailing-twelve-month yield is 4.60%, calculated from the sum of dividends over the past year divided by the current price. ### What is the duration of FIBUX? Effective duration measures FIBUX's sensitivity to interest-rate changes: a duration of 6 means a 1% rate move shifts NAV by roughly 6% in the opposite direction. FIBUX's current duration is published on the fund's factsheet on the issuer's website. ### What is the credit quality of FIBUX? FIBUX's credit quality breakdown (the share of holdings rated AAA through CCC and below) is published on the fund's factsheet. Higher-quality (investment-grade) funds yield less but carry less default risk than high-yield / junk bond funds. ### What is the yield to maturity of FIBUX? Yield to maturity (YTM) is the total return you'd earn from FIBUX if every bond in the portfolio is held to maturity at the current price. FIBUX's YTM is published on the fund's factsheet on the issuer's website. It differs from the trailing-12-month yield because YTM reflects current bond prices rather than historical income paid. ### Does FIBUX pay a dividend? Yes, Fidelity Flex U.S. Bond Index Fund (FIBUX) distributes dividends to shareholders. The trailing-twelve-month yield is 4.60%. Full dividend history is on this page. ### How often does FIBUX pay dividends? Fidelity Flex U.S. Bond Index Fund pays dividends Monthly. Each ex-dividend date, record date, and payment date is listed in the dividend history table on this page. ### When is FIBUX's next ex-dividend date? The most recently announced ex-dividend date for FIBUX was 2026-09-30. The next ex-date typically follows Monthly; once announced it appears at the top of the dividend history table on this page. ### How much will FIBUX's expense ratio cost me over 30 years? On a $10,000 investment compounding at 7% gross return, a 0.00% expense ratio quietly compounds against your balance every year. The Fee Compounding Forecast card above projects the dollar drag for any holding period and assumption you pick. The typical result for a 1.0% expense ratio on a 30-year hold is roughly 25% of the final balance lost to fees. ### How does FIBUX charge its expense ratio? The expense ratio is deducted in tiny daily slices from FIBUX's net asset value (NAV). You never see a bill. The price quoted on every exchange is already net of fees. There's no "fee day" to avoid; the cost is continuous and built into the trading price. ### Why does FIBUX cost more than a fund like VOO? FIBUX is a passive index fund (current expense ratio 0.00%). Differences from broad-market ETFs like VOO usually come from index licensing fees, asset class (bond funds typically run cheaper than equity), or fund scale (smaller funds spread fixed operating costs across less AUM). ### Are there cheaper alternatives to FIBUX? The Lower-Fee Alternatives card above lists mutual funds following the same investment strategy as FIBUX (0.00%) but at a lower expense ratio. Each row shows the fee gap, the peer's AUM as a liquidity sanity-check, and a direct link to that fund's analysis page. Cheaper price doesn't automatically mean better. Verify the peer holds what you actually want. ## More on Dividend Data - Overview (HTML): https://www.dividenddata.com/funds/fibux - Distribution history: https://www.dividenddata.com/funds/fibux/dividend - Holdings & diversification: https://www.dividenddata.com/funds/fibux/diversification - Fees & cheaper alternatives: https://www.dividenddata.com/funds/fibux/expenses - Peer comparison: https://www.dividenddata.com/funds/fibux/peers Data sourced from primary filings and market data providers; see https://www.dividenddata.com/methodology.