POSKX vs. VOO
Compare and contrast key facts about PrimeCap Odyssey Stock Fund (POSKX) and Vanguard S&P 500 ETF (VOO).
POSKX is managed by PRIMECAP Odyssey Funds. It was launched on Nov 1, 2004. VOO is a passively managed fund by Vanguard that tracks the performance of the S&P 500 Index. It was launched on Sep 7, 2010.
Performance
POSKX vs. VOO - Performance Comparison
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POSKX vs. VOO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
POSKX PrimeCap Odyssey Stock Fund | -1.96% | 25.73% | 12.77% | 21.18% | -11.12% | 32.48% | 10.13% | 27.15% | -7.19% | 25.99% |
VOO Vanguard S&P 500 ETF | -4.42% | 17.82% | 24.98% | 26.32% | -18.17% | 28.79% | 18.32% | 31.37% | -4.50% | 21.77% |
Returns By Period
In the year-to-date period, POSKX achieves a -1.96% return, which is significantly higher than VOO's -4.42% return. Both investments have delivered pretty close results over the past 10 years, with POSKX having a 13.84% annualized return and VOO not far ahead at 14.05%.
POSKX
- 1D
- -0.97%
- 1M
- -9.01%
- YTD
- -1.96%
- 6M
- 5.91%
- 1Y
- 26.50%
- 3Y*
- 17.57%
- 5Y*
- 11.90%
- 10Y*
- 13.84%
VOO
- 1D
- 2.86%
- 1M
- -5.01%
- YTD
- -4.42%
- 6M
- -1.84%
- 1Y
- 17.67%
- 3Y*
- 18.27%
- 5Y*
- 11.75%
- 10Y*
- 14.05%
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POSKX vs. VOO - Expense Ratio Comparison
POSKX has a 0.65% expense ratio, which is higher than VOO's 0.03% expense ratio.
Return for Risk
POSKX vs. VOO — Risk / Return Rank
POSKX
VOO
POSKX vs. VOO - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for PrimeCap Odyssey Stock Fund (POSKX) and Vanguard S&P 500 ETF (VOO). 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.
| POSKX | VOO | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 1.32 | 0.98 | +0.34 |
Sortino ratioReturn per unit of downside risk | 1.90 | 1.50 | +0.40 |
Omega ratioGain probability vs. loss probability | 1.27 | 1.23 | +0.05 |
Calmar ratioReturn relative to maximum drawdown | 1.84 | 1.53 | +0.31 |
Martin ratioReturn relative to average drawdown | 8.00 | 7.29 | +0.71 |
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
| POSKX | VOO | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.32 | 0.98 | +0.34 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.68 | 0.70 | -0.02 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.74 | 0.78 | -0.05 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.61 | 0.83 | -0.22 |
Correlation
The correlation between POSKX and VOO is 0.92, 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
POSKX vs. VOO - Dividend Comparison
POSKX's dividend yield for the trailing twelve months is around 27.99%, more than VOO's 1.19% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
POSKX PrimeCap Odyssey Stock Fund | 27.99% | 27.44% | 18.13% | 10.14% | 12.13% | 14.58% | 7.85% | 6.03% | 3.03% | 2.17% | 2.93% | 1.92% |
VOO Vanguard S&P 500 ETF | 1.19% | 1.13% | 1.24% | 1.46% | 1.69% | 1.25% | 1.54% | 1.88% | 2.06% | 1.78% | 2.02% | 2.10% |
Drawdowns
POSKX vs. VOO - Drawdown Comparison
The maximum POSKX drawdown since its inception was -50.18%, which is greater than VOO's maximum drawdown of -33.99%. Use the drawdown chart below to compare losses from any high point for POSKX and VOO.
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Drawdown Indicators
| POSKX | VOO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -50.18% | -33.99% | -16.19% |
Max Drawdown (1Y)Largest decline over 1 year | -13.30% | -11.98% | -1.32% |
Max Drawdown (5Y)Largest decline over 5 years | -22.96% | -24.52% | +1.56% |
Max Drawdown (10Y)Largest decline over 10 years | -36.88% | -33.99% | -2.89% |
Current DrawdownCurrent decline from peak | -9.99% | -6.29% | -3.70% |
Average DrawdownAverage peak-to-trough decline | -6.19% | -3.72% | -2.47% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.06% | 2.52% | +0.54% |
Volatility
POSKX vs. VOO - Volatility Comparison
PrimeCap Odyssey Stock Fund (POSKX) has a higher volatility of 5.71% compared to Vanguard S&P 500 ETF (VOO) at 5.29%. This indicates that POSKX's price experiences larger fluctuations and is considered to be riskier than VOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| POSKX | VOO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.71% | 5.29% | +0.42% |
Volatility (6M)Calculated over the trailing 6-month period | 11.60% | 9.44% | +2.16% |
Volatility (1Y)Calculated over the trailing 1-year period | 20.38% | 18.10% | +2.28% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 17.60% | 16.82% | +0.78% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 18.86% | 17.99% | +0.87% |