VPCCX vs. POSKX
VPCCX (Vanguard PRIMECAP Core Fund) and POSKX (PrimeCap Odyssey Stock Fund) are both Large Cap Blend Equities funds. Over the past 10 years, VPCCX returned 16.14%/yr vs 15.51%/yr for POSKX. Their 0.99 correlation means they have historically moved very closely together. VPCCX charges 0.37%/yr vs 0.65%/yr for POSKX.
Performance
VPCCX vs. POSKX - Performance Comparison
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Returns By Period
In the year-to-date period, VPCCX achieves a 24.47% return, which is significantly higher than POSKX's 19.75% return. Both investments have delivered pretty close results over the past 10 years, with VPCCX having a 16.14% annualized return and POSKX not far behind at 15.51%.
VPCCX
- 1D
- 2.99%
- 1M
- -3.96%
- 6M
- 16.68%
- YTD
- 24.47%
- 1Y
- 50.05%
- 3Y*
- 24.63%
- 5Y*
- 15.41%
- 10Y*
- 16.14%
- ALL TIME*
- 12.65%
POSKX
- 1D
- 2.24%
- 1M
- -3.83%
- 6M
- 14.11%
- YTD
- 19.75%
- 1Y
- 41.23%
- 3Y*
- 21.37%
- 5Y*
- 15.18%
- 10Y*
- 15.51%
- ALL TIME*
- 12.15%
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 |
VPCCX vs. POSKX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VPCCX Vanguard PRIMECAP Core Fund | 24.47% | 29.96% | 12.72% | 23.58% | -12.43% | 24.30% | 12.04% | 27.70% | -4.89% | 26.27% |
POSKX PrimeCap Odyssey Stock Fund | 19.75% | 25.73% | 12.77% | 21.18% | -11.12% | 32.48% | 10.13% | 27.15% | -7.19% | 25.99% |
Correlation
The correlation between VPCCX and POSKX is 0.97 - they have historically moved very closely together. At this level, their price movements offset little of one another.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.97 |
Correlation (3Y) Balances recent behavior with more history. | 0.98 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.98 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.99 |
Correlation (All Time) Calculated using the full available price history since Dec 9, 2004 | 0.99 |
The correlation between VPCCX and POSKX has been stable across timeframes, ranging from 0.97 to 0.99 - a consistent structural relationship.
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Return for Risk
VPCCX vs. POSKX — Risk / Return Rank
VPCCX
POSKX
VPCCX vs. POSKX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard PRIMECAP Core Fund (VPCCX) and PrimeCap Odyssey Stock Fund (POSKX). 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.
| VPCCX | POSKX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.29 | ||
| Sortino ratioReturn per unit of downside risk | +0.30 | ||
| Omega ratioGain probability vs. loss probability | 1.42 | 1.38 | +0.05 |
| Calmar ratioReturn relative to maximum drawdown | 4.42 | 3.80 | +0.62 |
| Martin ratioReturn relative to average drawdown | 15.82 | 13.00 | +2.82 |
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Drawdowns
VPCCX vs. POSKX - Drawdown Comparison
The maximum VPCCX drawdown since its inception was -47.53%, smaller than the maximum POSKX drawdown of -50.18%. Use the drawdown chart below to compare losses from any high point for VPCCX and POSKX.
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Drawdown Indicators
| VPCCX | POSKX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -47.53% | -50.18% | +2.65% |
Max Drawdown (1Y)Largest decline over 1 year | -10.50% | -9.99% | -0.51% |
Max Drawdown (3Y)Largest decline over 3 years | -19.92% | -20.25% | +0.33% |
Max Drawdown (5Y)Largest decline over 5 years | -22.75% | -22.96% | +0.21% |
Max Drawdown (10Y)Largest decline over 10 years | -34.60% | -36.88% | +2.28% |
Current DrawdownCurrent decline from peak | -7.82% | -7.00% | -0.82% |
Average DrawdownAverage peak-to-trough decline | -5.73% | -6.13% | +0.40% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.94% | 2.93% | +0.01% |
Volatility
VPCCX vs. POSKX - Volatility Comparison
Vanguard PRIMECAP Core Fund (VPCCX) has a higher volatility of 6.53% compared to PrimeCap Odyssey Stock Fund (POSKX) at 5.45%. This indicates that VPCCX's price experiences larger fluctuations and is considered to be riskier than POSKX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VPCCX | POSKX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.53% | 5.45% | +1.08% |
Volatility (6M)Calculated over the trailing 6-month period | 16.22% | 14.71% | +1.51% |
Volatility (1Y)Calculated over the trailing 1-year period | 19.14% | 17.77% | +1.37% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 18.15% | 18.17% | -0.02% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 18.94% | 19.07% | -0.13% |
VPCCX vs. POSKX - Expense Ratio Comparison
VPCCX has a 0.37% expense ratio, which is lower than POSKX's 0.65% expense ratio.
Dividends
VPCCX vs. POSKX - Dividend Comparison
VPCCX's dividend yield for the trailing twelve months is around 13.86%, less than POSKX's 22.91% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
POSKX PrimeCap Odyssey Stock Fund | 22.91% | 27.44% | 18.13% | 10.14% | 12.13% | 14.58% | 7.85% | 6.03% | 3.03% | 2.17% | 2.93% | 1.92% |
VPCCX Vanguard PRIMECAP Core Fund | 13.86% | 17.25% | 7.17% | 5.73% | 8.40% | 6.89% | 7.89% | 6.99% | 9.45% | 4.10% | 5.52% | 4.96% |
Frequently Asked Questions
With a correlation of 0.97, VPCCX and POSKX 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.
VPCCX has higher volatility (6.53%) compared to POSKX (5.45%). In terms of maximum drawdown, VPCCX dropped -47.53% vs POSKX's -50.18%.
VPCCX currently has the higher Sharpe Ratio (2.43 vs 2.14), 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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