POSKX vs. VPCCX
POSKX (PrimeCap Odyssey Stock Fund) and VPCCX (Vanguard PRIMECAP Core Fund) are both Large Cap Blend Equities funds. Over the past 10 years, POSKX returned 16.68%/yr vs 17.53%/yr for VPCCX. With a 0.99 correlation, they move nearly in lockstep. POSKX charges 0.65%/yr vs 0.37%/yr for VPCCX.
Performance
POSKX vs. VPCCX - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, POSKX achieves a 25.29% return, which is significantly lower than VPCCX's 32.08% return. Over the past 10 years, POSKX has underperformed VPCCX with an annualized return of 16.68%, while VPCCX has yielded a comparatively higher 17.53% annualized return.
POSKX
- 1D
- 1.81%
- 1M
- 4.82%
- YTD
- 25.29%
- 6M
- 23.99%
- 1Y
- 52.59%
- 3Y*
- 24.45%
- 5Y*
- 16.90%
- 10Y*
- 16.68%
VPCCX
- 1D
- 2.15%
- 1M
- 6.98%
- YTD
- 32.08%
- 6M
- 30.92%
- 1Y
- 64.43%
- 3Y*
- 28.50%
- 5Y*
- 17.51%
- 10Y*
- 17.53%
POSKX vs. VPCCX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
POSKX PrimeCap Odyssey Stock Fund | 25.29% | 25.73% | 12.77% | 21.18% | -11.12% | 32.48% | 10.13% | 27.15% | -7.19% | 25.99% |
VPCCX Vanguard PRIMECAP Core Fund | 32.08% | 29.96% | 12.72% | 23.58% | -12.43% | 24.30% | 12.04% | 27.70% | -4.89% | 26.27% |
Correlation
The correlation between POSKX and VPCCX is 0.97 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.97 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.98 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.99 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.99 |
Correlation (All Time) Calculated using the full available price history since Dec 9, 2004 | 0.99 |
The correlation between POSKX and VPCCX has been stable across timeframes, ranging from 0.97 to 0.99 - a consistent structural relationship.
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
POSKX vs. VPCCX — Risk / Return Rank
POSKX
VPCCX
POSKX vs. VPCCX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for PrimeCap Odyssey Stock Fund (POSKX) and Vanguard PRIMECAP Core Fund (VPCCX). 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.
| POSKX | VPCCX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.56 | ||
| Sortino ratioReturn per unit of downside risk | -0.59 | ||
| Omega ratioGain probability vs. loss probability | 1.54 | 1.64 | -0.10 |
| Calmar ratioReturn relative to maximum drawdown | 5.21 | 6.22 | -1.01 |
| Martin ratioReturn relative to average drawdown | 21.60 | 27.85 | -6.25 |
Loading charts...
Drawdowns
POSKX vs. VPCCX - Drawdown Comparison
The maximum POSKX drawdown since its inception was -50.18%, which is greater than VPCCX's maximum drawdown of -47.53%. Use the drawdown chart below to compare losses from any high point for POSKX and VPCCX.
Loading charts...
Drawdown Indicators
| POSKX | VPCCX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -50.18% | -47.53% | -2.65% |
Max Drawdown (1Y)Largest decline over 1 year | -9.99% | -10.29% | +0.30% |
Max Drawdown (3Y)Largest decline over 3 years | -20.25% | -19.92% | -0.33% |
Max Drawdown (5Y)Largest decline over 5 years | -22.96% | -22.75% | -0.21% |
Max Drawdown (10Y)Largest decline over 10 years | -36.88% | -34.60% | -2.28% |
Current DrawdownCurrent decline from peak | -0.46% | -0.10% | -0.36% |
Average DrawdownAverage peak-to-trough decline | -6.14% | -5.73% | -0.41% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.40% | 2.29% | +0.11% |
Volatility
POSKX vs. VPCCX - Volatility Comparison
The current volatility for PrimeCap Odyssey Stock Fund (POSKX) is 6.92%, while Vanguard PRIMECAP Core Fund (VPCCX) has a volatility of 7.79%. This indicates that POSKX experiences smaller price fluctuations and is considered to be less risky than VPCCX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| POSKX | VPCCX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.92% | 7.79% | -0.87% |
Volatility (6M)Calculated over the trailing 6-month period | 13.87% | 14.73% | -0.86% |
Volatility (1Y)Calculated over the trailing 1-year period | 16.89% | 17.60% | -0.71% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 18.05% | 17.88% | +0.17% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 19.08% | 18.87% | +0.21% |
POSKX vs. VPCCX - Expense Ratio Comparison
POSKX has a 0.65% expense ratio, which is higher than VPCCX's 0.37% expense ratio.
Dividends
POSKX vs. VPCCX - Dividend Comparison
POSKX's dividend yield for the trailing twelve months is around 21.90%, more than VPCCX's 13.06% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
POSKX PrimeCap Odyssey Stock Fund | 21.90% | 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 | 13.06% | 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, POSKX and VPCCX 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 (7.79%) compared to POSKX (6.92%). In terms of maximum drawdown, POSKX dropped -50.18% vs VPCCX's -47.53%.
VPCCX currently has the higher Sharpe Ratio (3.64 vs 3.08), 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.
Find the right allocation for POSKX and VPCCX
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer