PIODX vs. VPMAX
Compare and contrast key facts about Pioneer Fund (PIODX) and Vanguard PRIMECAP Fund Admiral Shares (VPMAX).
PIODX is managed by Amundi. It was launched on Feb 10, 1928. VPMAX is managed by Vanguard. It was launched on Nov 12, 2001.
Performance
PIODX vs. VPMAX - Performance Comparison
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PIODX vs. VPMAX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
PIODX Pioneer Fund | -4.16% | 23.30% | 22.62% | 28.45% | -19.43% | 27.40% | 24.01% | 31.04% | -1.48% | 21.79% |
VPMAX Vanguard PRIMECAP Fund Admiral Shares | -5.86% | 54.11% | 13.30% | 28.25% | -15.16% | 21.72% | 17.23% | 27.88% | -1.93% | 28.28% |
Returns By Period
In the year-to-date period, PIODX achieves a -4.16% return, which is significantly higher than VPMAX's -5.86% return. Over the past 10 years, PIODX has underperformed VPMAX with an annualized return of 14.89%, while VPMAX has yielded a comparatively higher 16.53% annualized return.
PIODX
- 1D
- -0.73%
- 1M
- -8.92%
- YTD
- -4.16%
- 6M
- 0.23%
- 1Y
- 27.06%
- 3Y*
- 21.05%
- 5Y*
- 12.41%
- 10Y*
- 14.89%
VPMAX
- 1D
- -1.19%
- 1M
- -10.43%
- YTD
- -5.86%
- 6M
- 22.85%
- 1Y
- 46.58%
- 3Y*
- 25.38%
- 5Y*
- 14.62%
- 10Y*
- 16.53%
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PIODX vs. VPMAX - Expense Ratio Comparison
PIODX has a 1.06% expense ratio, which is higher than VPMAX's 0.31% expense ratio.
Return for Risk
PIODX vs. VPMAX — Risk / Return Rank
PIODX
VPMAX
PIODX vs. VPMAX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Pioneer Fund (PIODX) and Vanguard PRIMECAP Fund Admiral Shares (VPMAX). 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.
| PIODX | VPMAX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 1.28 | 1.64 | -0.36 |
Sortino ratioReturn per unit of downside risk | 1.87 | 3.07 | -1.20 |
Omega ratioGain probability vs. loss probability | 1.27 | 1.44 | -0.17 |
Calmar ratioReturn relative to maximum drawdown | 1.92 | 3.21 | -1.29 |
Martin ratioReturn relative to average drawdown | 8.74 | 14.01 | -5.27 |
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
| PIODX | VPMAX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.28 | 1.64 | -0.36 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.65 | 0.73 | -0.08 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.80 | 0.83 | -0.03 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.52 | 0.61 | -0.10 |
Correlation
The correlation between PIODX and VPMAX is 0.93, 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
PIODX vs. VPMAX - Dividend Comparison
PIODX's dividend yield for the trailing twelve months is around 10.46%, less than VPMAX's 33.83% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
PIODX Pioneer Fund | 10.46% | 10.04% | 14.17% | 2.86% | 4.13% | 16.18% | 5.82% | 9.37% | 15.37% | 21.35% | 20.51% | 14.53% |
VPMAX Vanguard PRIMECAP Fund Admiral Shares | 33.83% | 31.85% | 6.71% | 7.24% | 9.94% | 10.18% | 9.82% | 7.23% | 8.43% | 4.52% | 5.13% | 5.99% |
Drawdowns
PIODX vs. VPMAX - Drawdown Comparison
The maximum PIODX drawdown since its inception was -53.40%, which is greater than VPMAX's maximum drawdown of -48.32%. Use the drawdown chart below to compare losses from any high point for PIODX and VPMAX.
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Drawdown Indicators
| PIODX | VPMAX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -53.40% | -48.32% | -5.08% |
Max Drawdown (1Y)Largest decline over 1 year | -12.75% | -13.75% | +1.00% |
Max Drawdown (5Y)Largest decline over 5 years | -26.55% | -25.21% | -1.34% |
Max Drawdown (10Y)Largest decline over 10 years | -30.14% | -32.65% | +2.51% |
Current DrawdownCurrent decline from peak | -9.99% | -11.72% | +1.73% |
Average DrawdownAverage peak-to-trough decline | -8.62% | -6.61% | -2.01% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.80% | 3.15% | -0.35% |
Volatility
PIODX vs. VPMAX - Volatility Comparison
The current volatility for Pioneer Fund (PIODX) is 5.29%, while Vanguard PRIMECAP Fund Admiral Shares (VPMAX) has a volatility of 5.57%. This indicates that PIODX experiences smaller price fluctuations and is considered to be less risky than VPMAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| PIODX | VPMAX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.29% | 5.57% | -0.28% |
Volatility (6M)Calculated over the trailing 6-month period | 11.51% | 21.87% | -10.36% |
Volatility (1Y)Calculated over the trailing 1-year period | 21.40% | 28.87% | -7.47% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 19.06% | 20.12% | -1.06% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 18.78% | 20.09% | -1.31% |