VSBSX vs. FBLTX
VSBSX (Vanguard Short-Term Treasury Index Fund Admiral Shares) and FBLTX (Fidelity SAI Long-Term Treasury Bond Index Fund) are both Government Bonds funds. Over the past 10 years, VSBSX returned 1.75%/yr vs -2.52%/yr for FBLTX. Their 0.59 correlation means they have sometimes moved together and sometimes differently. VSBSX charges 0.06%/yr vs 0.03%/yr for FBLTX.
Performance
VSBSX vs. FBLTX - Performance Comparison
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Returns By Period
In the year-to-date period, VSBSX achieves a 0.81% return, which is significantly higher than FBLTX's -3.37% return. Over the past 10 years, VSBSX has outperformed FBLTX with an annualized return of 1.75%, while FBLTX has yielded a comparatively lower -2.52% annualized return.
VSBSX
- 1D
- 0.05%
- 1M
- 0.15%
- 6M
- 0.61%
- YTD
- 0.81%
- 1Y
- 2.66%
- 3Y*
- 4.39%
- 5Y*
- 1.92%
- 10Y*
- 1.75%
- ALL TIME*
- 1.41%
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%
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 |
VSBSX vs. FBLTX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VSBSX Vanguard Short-Term Treasury Index Fund Admiral Shares | 0.81% | 5.08% | 4.39% | 4.23% | -3.87% | -0.69% | 3.09% | 3.51% | 1.52% | 0.35% |
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% |
Correlation
The correlation between VSBSX and FBLTX is 0.60, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.60 |
Correlation (3Y) Balances recent behavior with more history. | 0.61 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.61 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.59 |
Correlation (All Time) Calculated using the full available price history since Oct 16, 2015 | 0.59 |
The correlation between VSBSX and FBLTX has been stable across timeframes, ranging from 0.59 to 0.61 - a consistent structural relationship.
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Return for Risk
VSBSX vs. FBLTX — Risk / Return Rank
VSBSX
FBLTX
VSBSX vs. FBLTX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Short-Term Treasury Index Fund Admiral Shares (VSBSX) and Fidelity SAI Long-Term Treasury Bond Index Fund (FBLTX). 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.
| VSBSX | FBLTX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +2.45 | ||
| Sortino ratioReturn per unit of downside risk | +3.83 | ||
| Omega ratioGain probability vs. loss probability | 1.50 | 1.00 | +0.50 |
| Calmar ratioReturn relative to maximum drawdown | 3.74 | -0.05 | +3.79 |
| Martin ratioReturn relative to average drawdown | 14.92 | -0.10 | +15.02 |
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Drawdowns
VSBSX vs. FBLTX - Drawdown Comparison
The maximum VSBSX drawdown since its inception was -5.77%, smaller than the maximum FBLTX drawdown of -49.06%. Use the drawdown chart below to compare losses from any high point for VSBSX and FBLTX.
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Drawdown Indicators
| VSBSX | FBLTX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -5.77% | -49.06% | +43.29% |
Max Drawdown (1Y)Largest decline over 1 year | -0.84% | -7.66% | +6.82% |
Max Drawdown (3Y)Largest decline over 3 years | -0.84% | -14.75% | +13.91% |
Max Drawdown (5Y)Largest decline over 5 years | -5.72% | -44.19% | +38.47% |
Max Drawdown (10Y)Largest decline over 10 years | -5.77% | -49.06% | +43.29% |
Current DrawdownCurrent decline from peak | 0.00% | -42.95% | +42.95% |
Average DrawdownAverage peak-to-trough decline | -0.59% | -21.28% | +20.69% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.21% | 3.54% | -3.33% |
Volatility
VSBSX vs. FBLTX - Volatility Comparison
The current volatility for Vanguard Short-Term Treasury Index Fund Admiral Shares (VSBSX) is 0.36%, while Fidelity SAI Long-Term Treasury Bond Index Fund (FBLTX) has a volatility of 2.48%. This indicates that VSBSX experiences smaller price fluctuations and is considered to be less risky than FBLTX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VSBSX | FBLTX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.36% | 2.48% | -2.12% |
Volatility (6M)Calculated over the trailing 6-month period | 0.99% | 6.79% | -5.80% |
Volatility (1Y)Calculated over the trailing 1-year period | 1.30% | 9.26% | -7.96% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 1.96% | 15.57% | -13.61% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 1.54% | 14.51% | -12.97% |
VSBSX vs. FBLTX - Expense Ratio Comparison
VSBSX has a 0.06% expense ratio, which is higher than FBLTX's 0.03% 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
VSBSX vs. FBLTX - Dividend Comparison
VSBSX's dividend yield for the trailing twelve months is around 3.47%, less than FBLTX's 3.97% 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% |
VSBSX Vanguard Short-Term Treasury Index Fund Admiral Shares | 3.47% | 3.98% | 4.50% | 3.29% | 1.12% | 0.63% | 1.72% | 2.26% | 1.80% | 1.10% | 0.76% | 0.71% |
Frequently Asked Questions
VSBSX and FBLTX have a correlation of 0.60, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
FBLTX has higher volatility (2.48%) compared to VSBSX (0.36%). In terms of maximum drawdown, VSBSX dropped -5.77% vs FBLTX's -49.06%.
VSBSX currently has the higher Sharpe Ratio (2.41 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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