FUAMX vs. VSBIX

Last updated Jun 4, 2026

FUAMX (Fidelity Intermediate Treasury Bond Index Fund) and VSBIX (Vanguard Short-Term Treasury Index Fund Institutional Shares) are both Government Bonds funds. Over the past 5 years, FUAMX returned -0.36%/yr vs 1.89%/yr for VSBIX. Their correlation of 0.81 suggests significant overlap in exposure. FUAMX charges 0.03%/yr vs 0.05%/yr for VSBIX.

Performance

FUAMX vs. VSBIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Intermediate Treasury Bond Index Fund (FUAMX) and Vanguard Short-Term Treasury Index Fund Institutional Shares (VSBIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FUAMX achieves a -0.27% return, which is significantly lower than VSBIX's 0.52% return.

FUAMX

• 1D: 0.10%
• 1M: 0.10%
• YTD: -0.27%
• 6M: -0.64%
• 1Y: 4.20%
• 3Y*: 3.20%
• 5Y*: -0.36%
• 10Y*: —

VSBIX

• 1D: 0.00%
• 1M: 0.11%
• YTD: 0.52%
• 6M: 0.81%
• 1Y: 3.48%
• 3Y*: 4.29%
• 5Y*: 1.89%
• 10Y*: 1.77%

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

FUAMX vs. VSBIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FUAMX Fidelity Intermediate Treasury Bond Index Fund	-0.27%	8.00%	0.40%	4.08%	-13.06%	-3.19%	8.86%	7.25%	1.25%	-0.35%
VSBIX Vanguard Short-Term Treasury Index Fund Institutional Shares	0.52%	5.11%	4.37%	4.28%	-3.87%	-0.67%	3.11%	3.53%	1.52%	-0.22%

Correlation

The correlation between FUAMX and VSBIX is 0.87, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.87
Correlation (3Y) Calculated over the trailing 3-year period	0.84
Correlation (5Y) Calculated over the trailing 5-year period	0.84
Correlation (All Time) Calculated using the full available price history since Oct 20, 2017	0.81

The correlation between FUAMX and VSBIX has been stable across timeframes, ranging from 0.81 to 0.87 - a consistent structural relationship.

Return for Risk

FUAMX vs. VSBIX — Risk / Return Rank

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

FUAMX

FUAMX Risk / Return Rank: 12
FUAMX Sharpe Ratio Rank: 12
FUAMX Sortino Ratio Rank: 13
FUAMX Omega Ratio Rank: 11
FUAMX Calmar Ratio Rank: 11
FUAMX Martin Ratio Rank: 11

VSBIX

VSBIX Risk / Return Rank: 88
VSBIX Sharpe Ratio Rank: 84
VSBIX Sortino Ratio Rank: 92
VSBIX Omega Ratio Rank: 85
VSBIX Calmar Ratio Rank: 87
VSBIX Martin Ratio Rank: 89

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.

FUAMX vs. VSBIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Intermediate Treasury Bond Index Fund (FUAMX) and Vanguard Short-Term Treasury Index Fund Institutional Shares (VSBIX). 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.

	FUAMX	VSBIX	Difference
Sharpe ratio: Return per unit of total volatility	0.95	2.73	-1.78
Sortino ratio: Return per unit of downside risk	1.44	4.57	-3.13
Omega ratio: Gain probability vs. loss probability	1.17	1.58	-0.41
Calmar ratio: Return relative to maximum drawdown	1.11	4.28	-3.18
Martin ratio: Return relative to average drawdown	3.27	17.65	-14.39
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FUAMX vs. VSBIX - Sharpe Ratio Comparison

The current FUAMX Sharpe Ratio is 0.95, which is lower than the VSBIX Sharpe Ratio of 2.73. The chart below compares the historical Sharpe Ratios of FUAMX and VSBIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	FUAMX	VSBIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.95	2.73	-1.78
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.05	0.97	-1.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	1.16	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.22	1.09	-0.87

Drawdowns

FUAMX vs. VSBIX - Drawdown Comparison

The maximum FUAMX drawdown since its inception was -20.25%, which is greater than VSBIX's maximum drawdown of -5.74%. Use the drawdown chart below to compare losses from any high point for FUAMX and VSBIX.

Drawdown Indicators

	FUAMX	VSBIX	Difference
Max Drawdown Largest peak-to-trough decline	-20.25%	-5.74%	-14.51%
Max Drawdown (1Y) Largest decline over 1 year	-3.72%	-0.81%	-2.91%
Max Drawdown (3Y) Largest decline over 3 years	-6.07%	-0.81%	-5.26%
Max Drawdown (5Y) Largest decline over 5 years	-18.27%	-5.74%	-12.53%
Max Drawdown (10Y) Largest decline over 10 years	—	-5.74%	—
Current Drawdown Current decline from peak	-6.69%	-0.20%	-6.49%
Average Drawdown Average peak-to-trough decline	-7.32%	-0.59%	-6.73%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.26%	0.20%	+1.06%

Volatility

FUAMX vs. VSBIX - Volatility Comparison

Fidelity Intermediate Treasury Bond Index Fund (FUAMX) has a higher volatility of 1.44% compared to Vanguard Short-Term Treasury Index Fund Institutional Shares (VSBIX) at 0.39%. This indicates that FUAMX's price experiences larger fluctuations and is considered to be riskier than VSBIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FUAMX	VSBIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.44%	0.39%	+1.05%
Volatility (6M) Calculated over the trailing 6-month period	3.09%	0.86%	+2.23%
Volatility (1Y) Calculated over the trailing 1-year period	4.34%	1.27%	+3.07%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.63%	1.95%	+4.68%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.85%	1.53%	+4.32%

FUAMX vs. VSBIX - Expense Ratio Comparison

FUAMX has a 0.03% expense ratio, which is lower than VSBIX's 0.05% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

FUAMX vs. VSBIX - Dividend Comparison

FUAMX's dividend yield for the trailing twelve months is around 3.75%, less than VSBIX's 3.87% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FUAMX Fidelity Intermediate Treasury Bond Index Fund	3.75%	3.52%	3.58%	2.20%	1.24%	1.76%	2.90%	2.16%	2.23%	0.49%	0.00%	0.00%
VSBIX Vanguard Short-Term Treasury Index Fund Institutional Shares	3.87%	3.99%	4.52%	3.31%	1.14%	0.65%	1.74%	2.28%	1.81%	1.11%	0.80%	0.74%

Frequently Asked Questions

Can I hold both FUAMX and VSBIX in my portfolio?

FUAMX and VSBIX have a correlation of 0.87, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FUAMX or VSBIX?

FUAMX has higher volatility (1.44%) compared to VSBIX (0.39%). In terms of maximum drawdown, FUAMX dropped -20.25% vs VSBIX's -5.74%.

Which has better risk-adjusted returns?

VSBIX currently has the higher Sharpe Ratio (2.73 vs 0.95), 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.