BND vs. FIBUX

Last updated Jul 31, 2026

BND (Vanguard Total Bond Market ETF) and FIBUX (Fidelity Flex U.S. Bond Index Fund) are both Total Bond Market funds. Over the past 5 years, BND returned -0.37%/yr vs -0.53%/yr for FIBUX. Their correlation of 0.94 means they have usually moved in the same direction. BND charges 0.03%/yr vs 0.00%/yr for FIBUX.

Performance

BND vs. FIBUX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Total Bond Market ETF (BND) and Fidelity Flex U.S. Bond Index Fund (FIBUX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BND achieves a -0.28% return, which is significantly higher than FIBUX's -0.63% return.

BND

• 1D: 0.06%
• 1M: -1.02%
• 6M: -0.53%
• YTD: -0.28%
• 1Y: 2.92%
• 3Y*: 3.79%
• 5Y*: -0.37%
• 10Y*: 1.38%
• ALL TIME*: 3.00%

FIBUX

• 1D: -0.33%
• 1M: -1.42%
• 6M: -0.63%
• YTD: -0.63%
• 1Y: 3.00%
• 3Y*: 3.81%
• 5Y*: -0.53%
• 10Y*: —
• ALL TIME*: 1.64%

*Multi-year figures are annualized to reflect compound growth (CAGR)

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
BND Vanguard Total Bond Market ETF	$447.57M	$557.69M	$594.86M
FIBUX Fidelity Flex U.S. Bond Index Fund	$0.00	$0.00	$0.00

BND vs. FIBUX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BND Vanguard Total Bond Market ETF	-0.28%	7.08%	1.38%	5.65%	-13.11%	-1.86%	7.71%	8.84%	-0.12%	3.78%
FIBUX Fidelity Flex U.S. Bond Index Fund	-0.63%	7.20%	1.31%	5.46%	-13.41%	-2.16%	7.08%	8.58%	0.12%	3.81%

Correlation

The correlation between BND and FIBUX is 0.91, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.91
Correlation (3Y) Balances recent behavior with more history.	0.94
Correlation (5Y) Shows whether the relationship held over a longer period.	0.96
Correlation (All Time) Calculated using the full available price history since Mar 9, 2017	0.94

The correlation between BND and FIBUX has been stable across timeframes, ranging from 0.91 to 0.96 - a consistent structural relationship.

Return for Risk

BND vs. FIBUX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

BND

BND Risk / Return Rank: 32
BND Sharpe Ratio Rank: 33
BND Sortino Ratio Rank: 32
BND Omega Ratio Rank: 30
BND Calmar Ratio Rank: 34
BND Martin Ratio Rank: 31

FIBUX

FIBUX Risk / Return Rank: 16
FIBUX Sharpe Ratio Rank: 17
FIBUX Sortino Ratio Rank: 16
FIBUX Omega Ratio Rank: 15
FIBUX Calmar Ratio Rank: 17
FIBUX Martin Ratio Rank: 15

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

BND vs. FIBUX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Total Bond Market ETF (BND) and Fidelity Flex U.S. Bond Index Fund (FIBUX). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	BND	FIBUX	Difference
Sharpe ratio: Return per unit of total volatility	0.79	0.69	+0.10
Sortino ratio: Return per unit of downside risk	1.17	1.02	+0.16
Omega ratio: Gain probability vs. loss probability	1.14	1.12	+0.02
Calmar ratio: Return relative to maximum drawdown	1.10	0.90	+0.19
Martin ratio: Return relative to average drawdown	2.77	2.23	+0.54

BND vs. FIBUX - Sharpe Ratio Comparison

The current BND Sharpe Ratio is 0.79, which is comparable to the FIBUX Sharpe Ratio of 0.69. The chart below compares the historical Sharpe Ratios of BND and FIBUX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

BND vs. FIBUX - Drawdown Comparison

The maximum BND drawdown since its inception was -18.58%, smaller than the maximum FIBUX drawdown of -19.76%. Use the drawdown chart below to compare losses from any high point for BND and FIBUX.

Drawdown Indicators

	BND	FIBUX	Difference
Max Drawdown Largest peak-to-trough decline	-18.58%	-19.76%	+1.18%
Max Drawdown (1Y) Largest decline over 1 year	-2.68%	-2.97%	+0.29%
Max Drawdown (3Y) Largest decline over 3 years	-4.81%	-5.08%	+0.27%
Max Drawdown (5Y) Largest decline over 5 years	-17.91%	-18.40%	+0.49%
Max Drawdown (10Y) Largest decline over 10 years	-18.58%	—	—
Current Drawdown Current decline from peak	-2.90%	-4.49%	+1.59%
Average Drawdown Average peak-to-trough decline	-3.06%	-5.76%	+2.70%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.06%	1.20%	-0.14%

Volatility

BND vs. FIBUX - Volatility Comparison

Vanguard Total Bond Market ETF (BND) and Fidelity Flex U.S. Bond Index Fund (FIBUX) have volatilities of 0.96% and 0.99%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BND	FIBUX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.96%	0.99%	-0.03%
Volatility (6M) Calculated over the trailing 6-month period	2.88%	3.01%	-0.13%
Volatility (1Y) Calculated over the trailing 1-year period	3.70%	3.91%	-0.21%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.03%	6.04%	-0.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.53%	5.09%	+0.44%

BND vs. FIBUX - Expense Ratio Comparison

BND has a 0.03% expense ratio, which is higher than FIBUX's 0.00% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

BND vs. FIBUX - Dividend Comparison

BND's dividend yield for the trailing twelve months is around 4.01%, less than FIBUX's 4.15% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BND Vanguard Total Bond Market ETF	4.01%	3.86%	3.67%	3.09%	2.60%	2.12%	2.38%	2.72%	2.81%	2.54%	2.51%	2.57%
FIBUX Fidelity Flex U.S. Bond Index Fund	4.15%	3.95%	3.65%	2.93%	1.62%	1.18%	2.32%	2.96%	2.70%	2.45%	0.00%	0.00%

Frequently Asked Questions

Can I hold both BND and FIBUX in my portfolio?

With a correlation of 0.91, BND and FIBUX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, BND or FIBUX?

FIBUX has higher volatility (0.99%) compared to BND (0.96%). In terms of maximum drawdown, BND dropped -18.58% vs FIBUX's -19.76%.

Which has better risk-adjusted returns?

BND currently has the higher Sharpe Ratio (0.79 vs 0.69), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.