PRGMX vs. VSBSX
Compare and contrast key facts about T. Rowe Price GNMA Fund (PRGMX) and Vanguard Short-Term Treasury Index Fund Admiral Shares (VSBSX).
PRGMX is managed by T. Rowe Price. It was launched on Nov 25, 1985. VSBSX is managed by Vanguard. It was launched on Dec 28, 2009.
Performance
PRGMX vs. VSBSX - Performance Comparison
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PRGMX vs. VSBSX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
PRGMX T. Rowe Price GNMA Fund | 0.87% | 10.46% | 0.92% | 5.62% | -11.45% | -2.18% | 4.21% | 5.18% | 0.58% | 1.23% |
VSBSX Vanguard Short-Term Treasury Index Fund Admiral Shares | 0.29% | 5.08% | 4.39% | 4.23% | -3.87% | -0.69% | 3.09% | 3.51% | 1.52% | 0.35% |
Returns By Period
In the year-to-date period, PRGMX achieves a 0.87% return, which is significantly higher than VSBSX's 0.29% return. Over the past 10 years, PRGMX has underperformed VSBSX with an annualized return of 1.40%, while VSBSX has yielded a comparatively higher 1.74% annualized return.
PRGMX
- 1D
- 0.24%
- 1M
- -1.44%
- YTD
- 0.87%
- 6M
- 2.89%
- 1Y
- 7.97%
- 3Y*
- 4.79%
- 5Y*
- 0.72%
- 10Y*
- 1.40%
VSBSX
- 1D
- 0.10%
- 1M
- -0.31%
- YTD
- 0.29%
- 6M
- 1.25%
- 1Y
- 3.68%
- 3Y*
- 4.11%
- 5Y*
- 1.84%
- 10Y*
- 1.74%
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PRGMX vs. VSBSX - Expense Ratio Comparison
PRGMX has a 0.58% expense ratio, which is higher than VSBSX's 0.07% expense ratio.
Return for Risk
PRGMX vs. VSBSX — Risk / Return Rank
PRGMX
VSBSX
PRGMX vs. VSBSX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price GNMA Fund (PRGMX) and Vanguard Short-Term Treasury Index Fund Admiral Shares (VSBSX). 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.
| PRGMX | VSBSX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 1.77 | 2.60 | -0.83 |
Sortino ratioReturn per unit of downside risk | 2.53 | 4.12 | -1.59 |
Omega ratioGain probability vs. loss probability | 1.33 | 1.56 | -0.23 |
Calmar ratioReturn relative to maximum drawdown | 3.01 | 4.52 | -1.51 |
Martin ratioReturn relative to average drawdown | 8.77 | 17.41 | -8.64 |
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
| PRGMX | VSBSX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.77 | 2.60 | -0.83 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.11 | 0.96 | -0.84 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.30 | 1.14 | -0.84 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.94 | 1.07 | -0.13 |
Correlation
The correlation between PRGMX and VSBSX is 0.65, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.
Dividends
PRGMX vs. VSBSX - Dividend Comparison
PRGMX's dividend yield for the trailing twelve months is around 6.90%, more than VSBSX's 3.57% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
PRGMX T. Rowe Price GNMA Fund | 6.90% | 6.52% | 3.54% | 3.54% | 1.38% | 0.59% | 1.44% | 2.39% | 2.78% | 2.98% | 2.88% | 3.12% |
VSBSX Vanguard Short-Term Treasury Index Fund Admiral Shares | 3.57% | 3.98% | 4.50% | 3.29% | 1.12% | 0.63% | 1.72% | 2.26% | 1.80% | 1.10% | 0.76% | 0.71% |
Drawdowns
PRGMX vs. VSBSX - Drawdown Comparison
The maximum PRGMX drawdown since its inception was -18.22%, which is greater than VSBSX's maximum drawdown of -5.77%. Use the drawdown chart below to compare losses from any high point for PRGMX and VSBSX.
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Drawdown Indicators
| PRGMX | VSBSX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -18.22% | -5.77% | -12.45% |
Max Drawdown (1Y)Largest decline over 1 year | -2.93% | -0.84% | -2.09% |
Max Drawdown (5Y)Largest decline over 5 years | -17.70% | -5.77% | -11.93% |
Max Drawdown (10Y)Largest decline over 10 years | -18.22% | -5.77% | -12.45% |
Current DrawdownCurrent decline from peak | -1.91% | -0.43% | -1.48% |
Average DrawdownAverage peak-to-trough decline | -2.25% | -0.59% | -1.66% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.00% | 0.22% | +0.78% |
Volatility
PRGMX vs. VSBSX - Volatility Comparison
T. Rowe Price GNMA Fund (PRGMX) has a higher volatility of 1.74% compared to Vanguard Short-Term Treasury Index Fund Admiral Shares (VSBSX) at 0.53%. This indicates that PRGMX's price experiences larger fluctuations and is considered to be riskier than VSBSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| PRGMX | VSBSX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.74% | 0.53% | +1.21% |
Volatility (6M)Calculated over the trailing 6-month period | 2.76% | 0.84% | +1.92% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.77% | 1.44% | +3.33% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.33% | 1.94% | +4.39% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.73% | 1.53% | +3.20% |