FUTBX vs. FTBFX

Last updated Jun 23, 2026

FUTBX (Fidelity SAI U.S. Treasury Bond Index Fund) and FTBFX (Fidelity Total Bond Fund) are both mutual funds - FUTBX is a Government Bonds fund managed by Fidelity, while FTBFX is a Intermediate Core-Plus Bond fund actively managed by Fidelity. Over the past 5 years, FUTBX returned -0.58%/yr vs 0.58%/yr for FTBFX. Their correlation of 0.91 suggests significant overlap in exposure. FUTBX charges 0.03%/yr vs 0.45%/yr for FTBFX.

Performance

FUTBX vs. FTBFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity SAI U.S. Treasury Bond Index Fund (FUTBX) and Fidelity Total Bond Fund (FTBFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FUTBX achieves a 0.18% return, which is significantly lower than FTBFX's 0.57% return.

FUTBX

• 1D: 0.23%
• 1M: 0.83%
• YTD: 0.18%
• 6M: 0.42%
• 1Y: 3.55%
• 3Y*: 3.03%
• 5Y*: -0.58%
• 10Y*: —

FTBFX

• 1D: 0.21%
• 1M: 0.89%
• YTD: 0.57%
• 6M: 0.92%
• 1Y: 5.08%
• 3Y*: 4.76%
• 5Y*: 0.58%
• 10Y*: 2.46%

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

FUTBX vs. FTBFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FUTBX Fidelity SAI U.S. Treasury Bond Index Fund	0.18%	6.12%	0.70%	4.19%	-13.00%	-2.54%	7.76%	7.30%	0.95%	2.28%
FTBFX Fidelity Total Bond Fund	0.57%	7.50%	2.13%	7.25%	-13.58%	-0.44%	9.34%	9.89%	-0.66%	4.19%

Correlation

The correlation between FUTBX and FTBFX is 0.95 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.95
Correlation (3Y) Calculated over the trailing 3-year period	0.96
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (All Time) Calculated using the full available price history since Jan 3, 2017	0.91

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

Return for Risk

FUTBX vs. FTBFX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

FUTBX

FUTBX Risk / Return Rank: 13
FUTBX Sharpe Ratio Rank: 13
FUTBX Sortino Ratio Rank: 13
FUTBX Omega Ratio Rank: 12
FUTBX Calmar Ratio Rank: 13
FUTBX Martin Ratio Rank: 12

FTBFX

FTBFX Risk / Return Rank: 25
FTBFX Sharpe Ratio Rank: 25
FTBFX Sortino Ratio Rank: 27
FTBFX Omega Ratio Rank: 24
FTBFX Calmar Ratio Rank: 26
FTBFX Martin Ratio Rank: 22

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

FUTBX vs. FTBFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI U.S. Treasury Bond Index Fund (FUTBX) and Fidelity Total Bond Fund (FTBFX). 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.

	FUTBX	FTBFX	Difference
Sharpe ratio: Return per unit of total volatility	0.94	1.34	-0.40
Sortino ratio: Return per unit of downside risk	1.40	2.01	-0.61
Omega ratio: Gain probability vs. loss probability	1.16	1.24	-0.08
Calmar ratio: Return relative to maximum drawdown	1.16	1.76	-0.60
Martin ratio: Return relative to average drawdown	3.16	5.10	-1.94

FUTBX vs. FTBFX - Sharpe Ratio Comparison

The current FUTBX Sharpe Ratio is 0.94, which is comparable to the FTBFX Sharpe Ratio of 1.34. The chart below compares the historical Sharpe Ratios of FUTBX and FTBFX, 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

FUTBX vs. FTBFX - Drawdown Comparison

The maximum FUTBX drawdown since its inception was -19.69%, which is greater than FTBFX's maximum drawdown of -18.25%. Use the drawdown chart below to compare losses from any high point for FUTBX and FTBFX.

Drawdown Indicators

	FUTBX	FTBFX	Difference
Max Drawdown Largest peak-to-trough decline	-19.69%	-18.25%	-1.44%
Max Drawdown (1Y) Largest decline over 1 year	-3.09%	-2.89%	-0.20%
Max Drawdown (3Y) Largest decline over 3 years	-5.42%	-5.82%	+0.40%
Max Drawdown (5Y) Largest decline over 5 years	-17.03%	-18.25%	+1.22%
Max Drawdown (10Y) Largest decline over 10 years	—	-18.25%	—
Current Drawdown Current decline from peak	-7.51%	-1.31%	-6.20%
Average Drawdown Average peak-to-trough decline	-6.96%	-2.32%	-4.64%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.13%	1.00%	+0.13%

Volatility

FUTBX vs. FTBFX - Volatility Comparison

The current volatility for Fidelity SAI U.S. Treasury Bond Index Fund (FUTBX) is 1.08%, while Fidelity Total Bond Fund (FTBFX) has a volatility of 1.21%. This indicates that FUTBX experiences smaller price fluctuations and is considered to be less risky than FTBFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FUTBX	FTBFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.08%	1.21%	-0.13%
Volatility (6M) Calculated over the trailing 6-month period	2.77%	2.88%	-0.11%
Volatility (1Y) Calculated over the trailing 1-year period	3.80%	3.80%	0.00%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.81%	5.67%	+0.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.15%	4.73%	+0.42%

FUTBX vs. FTBFX - Expense Ratio Comparison

FUTBX has a 0.03% expense ratio, which is lower than FTBFX's 0.45% expense ratio.

Dividends

FUTBX vs. FTBFX - Dividend Comparison

FUTBX's dividend yield for the trailing twelve months is around 3.64%, less than FTBFX's 4.36% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FTBFX Fidelity Total Bond Fund	4.36%	4.36%	4.15%	4.15%	2.54%	1.89%	5.22%	3.03%	3.19%	2.97%	3.61%	3.30%
FUTBX Fidelity SAI U.S. Treasury Bond Index Fund	3.64%	3.43%	2.90%	2.12%	1.12%	0.86%	4.54%	2.75%	2.05%	1.65%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FUTBX and FTBFX in my portfolio?

With a correlation of 0.95, FUTBX and FTBFX 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, FUTBX or FTBFX?

FTBFX has higher volatility (1.21%) compared to FUTBX (1.08%). In terms of maximum drawdown, FUTBX dropped -19.69% vs FTBFX's -18.25%.

Which has better risk-adjusted returns?

FTBFX currently has the higher Sharpe Ratio (1.34 vs 0.94), 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.