FBLTX vs. VUSTX
FBLTX (Fidelity SAI Long-Term Treasury Bond Index Fund) and VUSTX (Vanguard Long-Term Treasury Fund Investor Shares) are both Government Bonds funds. Over the past 10 years, FBLTX returned -2.52%/yr vs -1.90%/yr for VUSTX. Their 0.99 correlation means they have historically moved very closely together. FBLTX charges 0.03%/yr vs 0.20%/yr for VUSTX.
Performance
FBLTX vs. VUSTX - Performance Comparison
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Returns By Period
In the year-to-date period, FBLTX achieves a -3.37% return, which is significantly lower than VUSTX's -3.13% return. Over the past 10 years, FBLTX has underperformed VUSTX with an annualized return of -2.52%, while VUSTX has yielded a comparatively higher -1.90% annualized return.
FBLTX
- 1D
- -0.16%
- 1M
- -3.63%
- 6M
- -3.28%
- YTD
- -3.37%
- 1Y
- -2.17%
- 3Y*
- -2.29%
- 5Y*
- -8.31%
- 10Y*
- -2.52%
- ALL TIME*
- -1.05%
VUSTX
- 1D
- -0.13%
- 1M
- -3.08%
- 6M
- -3.00%
- YTD
- -3.13%
- 1Y
- -1.38%
- 3Y*
- -0.98%
- 5Y*
- -7.07%
- 10Y*
- -1.90%
- ALL TIME*
- 4.84%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
FBLTX vs. VUSTX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
FBLTX Fidelity SAI Long-Term Treasury Bond Index Fund | -3.37% | 4.39% | -8.05% | 2.71% | -31.84% | -4.89% | 18.27% | 14.36% | -1.24% | 9.06% |
VUSTX Vanguard Long-Term Treasury Fund Investor Shares | -3.13% | 5.55% | -6.41% | 3.33% | -29.58% | -4.93% | 18.20% | 14.14% | -1.89% | 8.60% |
Correlation
The correlation between FBLTX and VUSTX is 0.98 - they have historically moved very closely together. At this level, their price movements offset little of one another.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.98 |
Correlation (3Y) Balances recent behavior with more history. | 0.98 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.99 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.99 |
Correlation (All Time) Calculated using the full available price history since Oct 16, 2015 | 0.99 |
The correlation between FBLTX and VUSTX has been stable across timeframes, ranging from 0.98 to 0.99 - a consistent structural relationship.
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Return for Risk
FBLTX vs. VUSTX — Risk / Return Rank
FBLTX
VUSTX
FBLTX vs. VUSTX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI Long-Term Treasury Bond Index Fund (FBLTX) and Vanguard Long-Term Treasury Fund Investor Shares (VUSTX). 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.
| FBLTX | VUSTX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.10 | ||
| Sortino ratioReturn per unit of downside risk | -0.13 | ||
| Omega ratioGain probability vs. loss probability | 1.00 | 1.02 | -0.02 |
| Calmar ratioReturn relative to maximum drawdown | -0.05 | 0.07 | -0.12 |
| Martin ratioReturn relative to average drawdown | -0.10 | 0.15 | -0.25 |
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Drawdowns
FBLTX vs. VUSTX - Drawdown Comparison
The maximum FBLTX drawdown since its inception was -49.06%, which is greater than VUSTX's maximum drawdown of -46.37%. Use the drawdown chart below to compare losses from any high point for FBLTX and VUSTX.
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Drawdown Indicators
| FBLTX | VUSTX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -49.06% | -46.37% | -2.69% |
Max Drawdown (1Y)Largest decline over 1 year | -7.66% | -7.19% | -0.47% |
Max Drawdown (3Y)Largest decline over 3 years | -14.75% | -13.58% | -1.17% |
Max Drawdown (5Y)Largest decline over 5 years | -44.19% | -41.45% | -2.74% |
Max Drawdown (10Y)Largest decline over 10 years | -49.06% | -46.37% | -2.69% |
Current DrawdownCurrent decline from peak | -42.95% | -38.41% | -4.54% |
Average DrawdownAverage peak-to-trough decline | -21.28% | -9.45% | -11.83% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.54% | 3.24% | +0.30% |
Volatility
FBLTX vs. VUSTX - Volatility Comparison
Fidelity SAI Long-Term Treasury Bond Index Fund (FBLTX) has a higher volatility of 2.48% compared to Vanguard Long-Term Treasury Fund Investor Shares (VUSTX) at 2.21%. This indicates that FBLTX's price experiences larger fluctuations and is considered to be riskier than VUSTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| FBLTX | VUSTX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 2.48% | 2.21% | +0.27% |
Volatility (6M)Calculated over the trailing 6-month period | 6.79% | 6.37% | +0.42% |
Volatility (1Y)Calculated over the trailing 1-year period | 9.26% | 8.55% | +0.71% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 15.57% | 14.50% | +1.07% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 14.51% | 13.69% | +0.82% |
FBLTX vs. VUSTX - Expense Ratio Comparison
FBLTX has a 0.03% expense ratio, which is lower than VUSTX's 0.20% 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
FBLTX vs. VUSTX - Dividend Comparison
FBLTX's dividend yield for the trailing twelve months is around 3.97%, less than VUSTX's 4.24% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FBLTX Fidelity SAI Long-Term Treasury Bond Index Fund | 3.97% | 4.04% | 3.60% | 3.29% | 2.25% | 1.81% | 6.73% | 2.39% | 2.87% | 2.68% | 3.70% | 0.39% |
VUSTX Vanguard Long-Term Treasury Fund Investor Shares | 4.24% | 4.29% | 4.03% | 3.33% | 2.93% | 4.21% | 10.38% | 2.82% | 2.82% | 2.64% | 5.27% | 5.52% |
Frequently Asked Questions
With a correlation of 0.98, FBLTX and VUSTX 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.
FBLTX has higher volatility (2.48%) compared to VUSTX (2.21%). In terms of maximum drawdown, FBLTX dropped -49.06% vs VUSTX's -46.37%.
VUSTX currently has the higher Sharpe Ratio (0.06 vs -0.04), 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.
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