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 -1.61%/yr vs -1.05%/yr for VUSTX. With a 0.99 correlation, they move nearly in lockstep. 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 -0.23% return, which is significantly higher than VUSTX's -0.31% return. Over the past 10 years, FBLTX has underperformed VUSTX with an annualized return of -1.61%, while VUSTX has yielded a comparatively higher -1.05% annualized return.
FBLTX
- 1D
- 0.15%
- 1M
- -0.24%
- YTD
- -0.23%
- 6M
- -0.77%
- 1Y
- 3.38%
- 3Y*
- -1.66%
- 5Y*
- -6.44%
- 10Y*
- -1.61%
VUSTX
- 1D
- 0.13%
- 1M
- -0.37%
- YTD
- -0.31%
- 6M
- -0.44%
- 1Y
- 4.08%
- 3Y*
- -0.52%
- 5Y*
- -5.32%
- 10Y*
- -1.05%
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 | -0.23% | 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 | -0.31% | 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 - 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 | 0.98 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.98 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.99 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.99 |
Correlation (All Time) Calculated using the full available price history since Oct 19, 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.
| FBLTX | VUSTX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.09 | ||
| Sortino ratioReturn per unit of downside risk | -0.11 | ||
| Omega ratioGain probability vs. loss probability | 1.07 | 1.08 | -0.01 |
| Calmar ratioReturn relative to maximum drawdown | 0.47 | 0.57 | -0.10 |
| Martin ratioReturn relative to average drawdown | 1.17 | 1.49 | -0.32 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| FBLTX | VUSTX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.37 | 0.46 | -0.09 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | -0.41 | -0.37 | -0.05 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | -0.11 | -0.08 | -0.03 |
Sharpe Ratio (All Time)Calculated using the full available price history | -0.05 | 0.44 | -0.49 |
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 | -19.12% | -17.70% | -1.42% |
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 | -41.10% | -36.62% | -4.48% |
Average DrawdownAverage peak-to-trough decline | -21.00% | -9.35% | -11.65% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.04% | 2.75% | +0.29% |
Volatility
FBLTX vs. VUSTX - Volatility Comparison
Fidelity SAI Long-Term Treasury Bond Index Fund (FBLTX) and Vanguard Long-Term Treasury Fund Investor Shares (VUSTX) have volatilities of 2.68% and 2.59%, 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.
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Volatility by Period
| FBLTX | VUSTX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 2.68% | 2.59% | +0.09% |
Volatility (6M)Calculated over the trailing 6-month period | 6.44% | 6.06% | +0.38% |
Volatility (1Y)Calculated over the trailing 1-year period | 9.78% | 9.06% | +0.72% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 15.69% | 14.60% | +1.09% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 14.58% | 13.76% | +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 4.17%, less than VUSTX's 4.47% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FBLTX Fidelity SAI Long-Term Treasury Bond Index Fund | 4.17% | 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 | 4.47% | 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 (2.68%) compared to VUSTX (2.59%). In terms of maximum drawdown, FBLTX dropped -49.06% vs VUSTX's -46.37%.
VUSTX currently has the higher Sharpe Ratio (0.46 vs 0.37), 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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