PRBLX vs. AMFEX
PRBLX (Parnassus Core Equity Fund Investor Shares) and AMFEX (AAMA Equity Fund) are both Large Cap Blend Equities funds. Over the past 5 years, PRBLX returned 9.28%/yr vs 10.69%/yr for AMFEX. Their correlation of 0.93 means they have usually moved in the same direction. PRBLX charges 0.81%/yr vs 1.17%/yr for AMFEX.
Performance
PRBLX vs. AMFEX - Performance Comparison
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Returns By Period
In the year-to-date period, PRBLX achieves a 7.76% return, which is significantly lower than AMFEX's 13.57% return.
PRBLX
- 1D
- 1.79%
- 1M
- -0.84%
- 6M
- 6.19%
- YTD
- 7.76%
- 1Y
- 11.73%
- 3Y*
- 14.28%
- 5Y*
- 9.28%
- 10Y*
- 13.50%
- ALL TIME*
- 11.23%
AMFEX
- 1D
- 0.80%
- 1M
- 0.71%
- 6M
- 8.82%
- YTD
- 13.57%
- 1Y
- 24.69%
- 3Y*
- 16.86%
- 5Y*
- 10.69%
- 10Y*
- —
- ALL TIME*
- 12.18%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
AMFEX AAMA Equity Fund | $0.00 | $0.00 | $0.00 |
| $0.00 | $0.00 | $0.00 |
PRBLX vs. AMFEX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
PRBLX Parnassus Core Equity Fund Investor Shares | 7.76% | 11.67% | 18.58% | 24.97% | -18.64% | 27.59% | 21.21% | 30.68% | -6.50% |
AMFEX AAMA Equity Fund | 13.57% | 17.33% | 16.28% | 17.32% | -14.08% | 22.58% | 12.70% | 24.62% | -9.60% |
Correlation
The correlation between PRBLX and AMFEX is 0.82, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.82 |
Correlation (3Y) Balances recent behavior with more history. | 0.87 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.92 |
Correlation (All Time) Calculated using the full available price history since Nov 7, 2018 | 0.93 |
The correlation between PRBLX and AMFEX shifts across timeframes, from 0.82 (1 year) to 0.93 (all time), reflecting how their relationship changes across market environments.
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Return for Risk
PRBLX vs. AMFEX — Risk / Return Rank
PRBLX
AMFEX
PRBLX vs. AMFEX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Parnassus Core Equity Fund Investor Shares (PRBLX) and AAMA Equity Fund (AMFEX). 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.
| PRBLX | AMFEX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.51 | ||
| Sortino ratioReturn per unit of downside risk | -1.96 | ||
| Omega ratioGain probability vs. loss probability | 1.13 | 1.39 | -0.27 |
| Calmar ratioReturn relative to maximum drawdown | 0.79 | 3.69 | -2.90 |
| Martin ratioReturn relative to average drawdown | 3.05 | 15.37 | -12.32 |
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Drawdowns
PRBLX vs. AMFEX - Drawdown Comparison
The maximum PRBLX drawdown since its inception was -42.20%, which is greater than AMFEX's maximum drawdown of -30.41%. Use the drawdown chart below to compare losses from any high point for PRBLX and AMFEX.
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Drawdown Indicators
| PRBLX | AMFEX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -42.20% | -30.41% | -11.79% |
Max Drawdown (1Y)Largest decline over 1 year | -11.63% | -6.07% | -5.56% |
Max Drawdown (3Y)Largest decline over 3 years | -16.31% | -15.23% | -1.08% |
Max Drawdown (5Y)Largest decline over 5 years | -26.31% | -21.21% | -5.10% |
Max Drawdown (10Y)Largest decline over 10 years | -30.09% | — | — |
Current DrawdownCurrent decline from peak | -1.70% | -0.42% | -1.28% |
Average DrawdownAverage peak-to-trough decline | -4.03% | -4.24% | +0.21% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.03% | 1.46% | +1.57% |
Volatility
PRBLX vs. AMFEX - Volatility Comparison
Parnassus Core Equity Fund Investor Shares (PRBLX) has a higher volatility of 3.70% compared to AAMA Equity Fund (AMFEX) at 2.37%. This indicates that PRBLX's price experiences larger fluctuations and is considered to be riskier than AMFEX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| PRBLX | AMFEX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 3.70% | 2.37% | +1.33% |
Volatility (6M)Calculated over the trailing 6-month period | 10.38% | 7.74% | +2.64% |
Volatility (1Y)Calculated over the trailing 1-year period | 12.90% | 10.10% | +2.80% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 16.40% | 14.22% | +2.18% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 17.28% | 16.84% | +0.44% |
PRBLX vs. AMFEX - Expense Ratio Comparison
PRBLX has a 0.81% expense ratio, which is lower than AMFEX's 1.17% expense ratio.
Dividends
PRBLX vs. AMFEX - Dividend Comparison
PRBLX's dividend yield for the trailing twelve months is around 17.66%, more than AMFEX's 10.56% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AMFEX AAMA Equity Fund | 10.56% | 11.99% | 9.19% | 0.92% | 4.82% | 0.22% | 0.44% | 0.78% | 0.83% | 0.00% | 0.00% | 0.00% |
PRBLX Parnassus Core Equity Fund Investor Shares | 17.66% | 19.08% | 10.00% | 6.01% | 10.13% | 7.77% | 5.87% | 8.02% | 9.64% | 7.16% | 3.80% | 9.62% |
Frequently Asked Questions
PRBLX and AMFEX have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
PRBLX has higher volatility (3.70%) compared to AMFEX (2.37%). In terms of maximum drawdown, PRBLX dropped -42.20% vs AMFEX's -30.41%.
AMFEX currently has the higher Sharpe Ratio (2.22 vs 0.71), 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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