TISPX vs. PRILX

Last updated Jun 25, 2026

TISPX (TIAA-CREF S&P 500 Index Fund) and PRILX (Parnassus Core Equity Institutional Shares) are both Large Cap Blend Equities funds. Over the past 10 years, TISPX returned 15.37%/yr vs 14.05%/yr for PRILX. With a 0.95 correlation, they move nearly in lockstep. TISPX charges 0.05%/yr vs 0.61%/yr for PRILX.

Performance

TISPX vs. PRILX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in TIAA-CREF S&P 500 Index Fund (TISPX) and Parnassus Core Equity Institutional Shares (PRILX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TISPX achieves a 8.20% return, which is significantly higher than PRILX's 5.53% return. Over the past 10 years, TISPX has outperformed PRILX with an annualized return of 15.37%, while PRILX has yielded a comparatively lower 14.05% annualized return.

TISPX

• 1D: -1.43%
• 1M: -1.33%
• YTD: 8.20%
• 6M: 6.87%
• 1Y: 22.26%
• 3Y*: 20.75%
• 5Y*: 13.10%
• 10Y*: 15.37%

PRILX

• 1D: -1.45%
• 1M: 0.29%
• YTD: 5.53%
• 6M: 4.60%
• 1Y: 11.90%
• 3Y*: 15.65%
• 5Y*: 9.90%
• 10Y*: 14.05%

*Multi-year figures are annualized to reflect compound growth (CAGR)

TISPX vs. PRILX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TISPX TIAA-CREF S&P 500 Index Fund	8.20%	17.79%	24.94%	26.22%	-18.13%	28.66%	18.34%	31.44%	-4.52%	19.58%
PRILX Parnassus Core Equity Institutional Shares	5.53%	11.91%	18.81%	25.25%	-18.47%	27.86%	21.50%	30.95%	-0.06%	16.87%

Correlation

The correlation between TISPX and PRILX is 0.93, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Apr 28, 2006	0.95

The correlation between TISPX and PRILX has been stable across timeframes, ranging from 0.93 to 0.95 - a consistent structural relationship.

Return for Risk

TISPX vs. PRILX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

TISPX

TISPX Risk / Return Rank: 52
TISPX Sharpe Ratio Rank: 49
TISPX Sortino Ratio Rank: 45
TISPX Omega Ratio Rank: 47
TISPX Calmar Ratio Rank: 54
TISPX Martin Ratio Rank: 66

PRILX

PRILX Risk / Return Rank: 17
PRILX Sharpe Ratio Rank: 18
PRILX Sortino Ratio Rank: 17
PRILX Omega Ratio Rank: 16
PRILX Calmar Ratio Rank: 14
PRILX Martin Ratio Rank: 19

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

TISPX vs. PRILX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for TIAA-CREF S&P 500 Index Fund (TISPX) and Parnassus Core Equity Institutional Shares (PRILX). 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.

	TISPX	PRILX	Difference
Sharpe ratio: Return per unit of total volatility	1.90	1.08	+0.82
Sortino ratio: Return per unit of downside risk	2.59	1.56	+1.03
Omega ratio: Gain probability vs. loss probability	1.34	1.19	+0.15
Calmar ratio: Return relative to maximum drawdown	2.68	1.15	+1.53
Martin ratio: Return relative to average drawdown	12.01	4.47	+7.54

TISPX vs. PRILX - Sharpe Ratio Comparison

The current TISPX Sharpe Ratio is 1.90, which is higher than the PRILX Sharpe Ratio of 1.08. The chart below compares the historical Sharpe Ratios of TISPX and PRILX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

TISPX vs. PRILX - Drawdown Comparison

The maximum TISPX drawdown since its inception was -55.16%, which is greater than PRILX's maximum drawdown of -42.00%. Use the drawdown chart below to compare losses from any high point for TISPX and PRILX.

Drawdown Indicators

	TISPX	PRILX	Difference
Max Drawdown Largest peak-to-trough decline	-55.16%	-42.00%	-13.16%
Max Drawdown (1Y) Largest decline over 1 year	-8.90%	-11.61%	+2.71%
Max Drawdown (3Y) Largest decline over 3 years	-18.74%	-16.28%	-2.46%
Max Drawdown (5Y) Largest decline over 5 years	-24.48%	-26.18%	+1.70%
Max Drawdown (10Y) Largest decline over 10 years	-33.75%	-30.02%	-3.73%
Current Drawdown Current decline from peak	-3.12%	-2.29%	-0.83%
Average Drawdown Average peak-to-trough decline	-6.71%	-4.64%	-2.07%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.98%	2.98%	-1.00%

Volatility

TISPX vs. PRILX - Volatility Comparison

TIAA-CREF S&P 500 Index Fund (TISPX) and Parnassus Core Equity Institutional Shares (PRILX) have volatilities of 4.89% and 4.86%, 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.

Volatility by Period

	TISPX	PRILX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.89%	4.86%	+0.03%
Volatility (6M) Calculated over the trailing 6-month period	9.95%	10.06%	-0.11%
Volatility (1Y) Calculated over the trailing 1-year period	12.59%	12.44%	+0.15%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.99%	16.35%	+0.64%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.09%	17.26%	+0.83%

TISPX vs. PRILX - Expense Ratio Comparison

TISPX has a 0.05% expense ratio, which is lower than PRILX's 0.61% expense ratio.

Dividends

TISPX vs. PRILX - Dividend Comparison

TISPX's dividend yield for the trailing twelve months is around 2.17%, less than PRILX's 18.12% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PRILX Parnassus Core Equity Institutional Shares	18.12%	19.16%	10.17%	6.18%	10.34%	7.94%	6.04%	8.23%	9.89%	7.37%	3.99%	9.84%
TISPX TIAA-CREF S&P 500 Index Fund	2.17%	2.35%	1.52%	1.48%	1.91%	1.77%	1.53%	2.16%	2.94%	0.36%	2.39%	0.65%

Frequently Asked Questions

Can I hold both TISPX and PRILX in my portfolio?

With a correlation of 0.93, TISPX and PRILX 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.

Which is riskier, TISPX or PRILX?

TISPX has higher volatility (4.89%) compared to PRILX (4.86%). In terms of maximum drawdown, TISPX dropped -55.16% vs PRILX's -42.00%.

Which has better risk-adjusted returns?

TISPX currently has the higher Sharpe Ratio (1.90 vs 1.08), 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.