VSBIX vs. TWUSX
Compare and contrast key facts about Vanguard Short-Term Treasury Index Fund Institutional Shares (VSBIX) and American Century Short-Term Government Fund (TWUSX).
VSBIX is managed by Vanguard. It was launched on Aug 23, 2010. TWUSX is managed by American Century. It was launched on Dec 14, 1982.
Performance
VSBIX vs. TWUSX - Performance Comparison
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VSBIX vs. TWUSX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VSBIX Vanguard Short-Term Treasury Index Fund Institutional Shares | 0.28% | 5.11% | 4.37% | 4.28% | -3.87% | -0.67% | 3.11% | 3.53% | 1.52% | 0.40% |
TWUSX American Century Short-Term Government Fund | 0.02% | 4.94% | 3.59% | 3.70% | -4.31% | -0.09% | 3.36% | 2.91% | 1.12% | 0.22% |
Returns By Period
In the year-to-date period, VSBIX achieves a 0.28% return, which is significantly higher than TWUSX's 0.02% return. Over the past 10 years, VSBIX has outperformed TWUSX with an annualized return of 1.76%, while TWUSX has yielded a comparatively lower 1.48% annualized return.
VSBIX
- 1D
- 0.04%
- 1M
- -0.33%
- YTD
- 0.28%
- 6M
- 1.24%
- 1Y
- 3.69%
- 3Y*
- 4.12%
- 5Y*
- 1.86%
- 10Y*
- 1.76%
TWUSX
- 1D
- 0.11%
- 1M
- -0.54%
- YTD
- 0.02%
- 6M
- 0.92%
- 1Y
- 3.39%
- 3Y*
- 3.54%
- 5Y*
- 1.46%
- 10Y*
- 1.48%
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VSBIX vs. TWUSX - Expense Ratio Comparison
VSBIX has a 0.05% expense ratio, which is lower than TWUSX's 0.55% expense ratio.
Return for Risk
VSBIX vs. TWUSX — Risk / Return Rank
VSBIX
TWUSX
VSBIX vs. TWUSX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Short-Term Treasury Index Fund Institutional Shares (VSBIX) and American Century Short-Term Government Fund (TWUSX). 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.
| VSBIX | TWUSX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 2.65 | 1.84 | +0.80 |
Sortino ratioReturn per unit of downside risk | 4.33 | 3.16 | +1.17 |
Omega ratioGain probability vs. loss probability | 1.58 | 1.40 | +0.18 |
Calmar ratioReturn relative to maximum drawdown | 4.70 | 3.93 | +0.78 |
Martin ratioReturn relative to average drawdown | 18.02 | 12.74 | +5.28 |
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
| VSBIX | TWUSX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 2.65 | 1.84 | +0.80 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.96 | 0.64 | +0.32 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 1.16 | 0.82 | +0.33 |
Sharpe Ratio (All Time)Calculated using the full available price history | 1.09 | -0.00 | +1.09 |
Correlation
The correlation between VSBIX and TWUSX is 0.73, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
VSBIX vs. TWUSX - Dividend Comparison
VSBIX's dividend yield for the trailing twelve months is around 3.59%, more than TWUSX's 3.34% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
VSBIX Vanguard Short-Term Treasury Index Fund Institutional Shares | 3.59% | 3.99% | 4.52% | 3.31% | 1.14% | 0.65% | 1.74% | 2.28% | 1.81% | 1.11% | 0.80% | 0.74% |
TWUSX American Century Short-Term Government Fund | 3.34% | 3.70% | 4.06% | 3.83% | 1.12% | 1.05% | 0.72% | 1.81% | 1.74% | 1.06% | 0.57% | 0.53% |
Drawdowns
VSBIX vs. TWUSX - Drawdown Comparison
The maximum VSBIX drawdown since its inception was -5.74%, smaller than the maximum TWUSX drawdown of -91.08%. Use the drawdown chart below to compare losses from any high point for VSBIX and TWUSX.
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Drawdown Indicators
| VSBIX | TWUSX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -5.74% | -91.08% | +85.34% |
Max Drawdown (1Y)Largest decline over 1 year | -0.81% | -0.98% | +0.17% |
Max Drawdown (5Y)Largest decline over 5 years | -5.74% | -5.85% | +0.11% |
Max Drawdown (10Y)Largest decline over 10 years | -5.74% | -5.85% | +0.11% |
Current DrawdownCurrent decline from peak | -0.44% | -74.71% | +74.27% |
Average DrawdownAverage peak-to-trough decline | -0.59% | -81.79% | +81.20% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.21% | 0.30% | -0.09% |
Volatility
VSBIX vs. TWUSX - Volatility Comparison
Vanguard Short-Term Treasury Index Fund Institutional Shares (VSBIX) and American Century Short-Term Government Fund (TWUSX) have volatilities of 0.51% and 0.52%, 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
| VSBIX | TWUSX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.51% | 0.52% | -0.01% |
Volatility (6M)Calculated over the trailing 6-month period | 0.82% | 1.12% | -0.30% |
Volatility (1Y)Calculated over the trailing 1-year period | 1.42% | 1.94% | -0.52% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 1.94% | 2.28% | -0.34% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 1.53% | 1.80% | -0.27% |