PRBLX vs. FITLX
PRBLX (Parnassus Core Equity Fund Investor Shares) and FITLX (Fidelity U.S. Sustainability Index Fund) are both Large Cap Blend Equities funds. PRBLX is actively managed, while FITLX is passively managed. Over the past 5 years, PRBLX returned 9.28%/yr vs 12.48%/yr for FITLX. Their 0.95 correlation means they have historically moved very closely together. PRBLX charges 0.81%/yr vs 0.11%/yr for FITLX.
Performance
PRBLX vs. FITLX - 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 FITLX's 8.63% 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%
FITLX
- 1D
- 2.13%
- 1M
- -1.05%
- 6M
- 7.02%
- YTD
- 8.63%
- 1Y
- 20.47%
- 3Y*
- 19.14%
- 5Y*
- 12.48%
- 10Y*
- —
- ALL TIME*
- 15.18%
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 |
PRBLX vs. FITLX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
PRBLX Parnassus Core Equity Fund Investor Shares | 7.76% | 11.67% | 18.58% | 24.97% | -18.64% | 27.59% | 21.21% | 30.68% | -0.30% | 10.20% |
FITLX Fidelity U.S. Sustainability Index Fund | 8.63% | 18.77% | 23.59% | 29.04% | -20.28% | 31.55% | 18.69% | 31.54% | -3.32% | 13.07% |
Correlation
The correlation between PRBLX and FITLX is 0.91, 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. | 0.91 |
Correlation (3Y) Balances recent behavior with more history. | 0.93 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.95 |
Correlation (All Time) Calculated using the full available price history since May 9, 2017 | 0.95 |
The correlation between PRBLX and FITLX has been stable across timeframes, ranging from 0.91 to 0.95 - a consistent structural relationship.
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Return for Risk
PRBLX vs. FITLX — Risk / Return Rank
PRBLX
FITLX
PRBLX vs. FITLX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Parnassus Core Equity Fund Investor Shares (PRBLX) and Fidelity U.S. Sustainability Index Fund (FITLX). 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 | FITLX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.61 | ||
| Sortino ratioReturn per unit of downside risk | -0.82 | ||
| Omega ratioGain probability vs. loss probability | 1.13 | 1.24 | -0.11 |
| Calmar ratioReturn relative to maximum drawdown | 0.79 | 1.64 | -0.85 |
| Martin ratioReturn relative to average drawdown | 3.05 | 6.77 | -3.72 |
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Drawdowns
PRBLX vs. FITLX - Drawdown Comparison
The maximum PRBLX drawdown since its inception was -42.20%, which is greater than FITLX's maximum drawdown of -34.35%. Use the drawdown chart below to compare losses from any high point for PRBLX and FITLX.
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Drawdown Indicators
| PRBLX | FITLX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -42.20% | -34.35% | -7.85% |
Max Drawdown (1Y)Largest decline over 1 year | -11.63% | -11.15% | -0.48% |
Max Drawdown (3Y)Largest decline over 3 years | -16.31% | -19.99% | +3.68% |
Max Drawdown (5Y)Largest decline over 5 years | -26.31% | -26.91% | +0.60% |
Max Drawdown (10Y)Largest decline over 10 years | -30.09% | — | — |
Current DrawdownCurrent decline from peak | -1.70% | -2.10% | +0.40% |
Average DrawdownAverage peak-to-trough decline | -4.03% | -5.02% | +0.99% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.03% | 2.69% | +0.34% |
Volatility
PRBLX vs. FITLX - Volatility Comparison
Parnassus Core Equity Fund Investor Shares (PRBLX) and Fidelity U.S. Sustainability Index Fund (FITLX) have volatilities of 3.70% and 3.84%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| PRBLX | FITLX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 3.70% | 3.84% | -0.14% |
Volatility (6M)Calculated over the trailing 6-month period | 10.38% | 11.03% | -0.65% |
Volatility (1Y)Calculated over the trailing 1-year period | 12.90% | 13.83% | -0.93% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 16.40% | 17.73% | -1.33% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 17.28% | 19.05% | -1.77% |
PRBLX vs. FITLX - Expense Ratio Comparison
PRBLX has a 0.81% expense ratio, which is higher than FITLX's 0.11% expense ratio.
Dividends
PRBLX vs. FITLX - Dividend Comparison
PRBLX's dividend yield for the trailing twelve months is around 17.66%, more than FITLX's 1.02% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
FITLX Fidelity U.S. Sustainability Index Fund | 1.02% | 1.11% | 1.29% | 1.12% | 1.49% | 0.99% | 1.01% | 1.41% | 1.58% | 0.76% | 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
With a correlation of 0.91, PRBLX and FITLX 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.
FITLX has higher volatility (3.84%) compared to PRBLX (3.70%). In terms of maximum drawdown, PRBLX dropped -42.20% vs FITLX's -34.35%.
FITLX currently has the higher Sharpe Ratio (1.32 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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