PAULX vs. PREIX

Last updated Jun 4, 2026

PAULX (T. Rowe Price U.S. Large-Cap Core Fund) and PREIX (T. Rowe Price Equity Index 500 Fund) are both Large Cap Blend Equities funds from T. Rowe Price. Over the past 10 years, PAULX returned 13.25%/yr vs 15.42%/yr for PREIX. With a 0.98 correlation, they move nearly in lockstep. PAULX charges 0.97%/yr vs 0.15%/yr for PREIX.

Performance

PAULX vs. PREIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price U.S. Large-Cap Core Fund (PAULX) and T. Rowe Price Equity Index 500 Fund (PREIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PAULX achieves a 8.96% return, which is significantly lower than PREIX's 11.61% return. Over the past 10 years, PAULX has underperformed PREIX with an annualized return of 13.25%, while PREIX has yielded a comparatively higher 15.42% annualized return.

PAULX

• 1D: 0.34%
• 1M: 3.41%
• YTD: 8.96%
• 6M: 8.59%
• 1Y: 20.06%
• 3Y*: 19.40%
• 5Y*: 11.62%
• 10Y*: 13.25%

PREIX

• 1D: 0.13%
• 1M: 5.78%
• YTD: 11.61%
• 6M: 11.63%
• 1Y: 28.74%
• 3Y*: 22.53%
• 5Y*: 14.08%
• 10Y*: 15.42%

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

PAULX vs. PREIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PAULX T. Rowe Price U.S. Large-Cap Core Fund	8.96%	12.43%	22.59%	22.23%	-15.42%	25.18%	15.25%	29.16%	-3.65%	20.22%
PREIX T. Rowe Price Equity Index 500 Fund	11.61%	17.66%	24.78%	26.07%	-18.27%	28.48%	18.17%	31.47%	-4.59%	21.01%

Correlation

The correlation between PAULX and PREIX is 0.95 - 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	0.95
Correlation (3Y) Calculated over the trailing 3-year period	0.97
Correlation (5Y) Calculated over the trailing 5-year period	0.97
Correlation (10Y) Calculated over the trailing 10-year period	0.97
Correlation (All Time) Calculated using the full available price history since Jun 29, 2009	0.98

The correlation between PAULX and PREIX has been stable across timeframes, ranging from 0.95 to 0.98 - a consistent structural relationship.

Return for Risk

PAULX vs. PREIX — Risk / Return Rank

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

PAULX

PAULX Risk / Return Rank: 43
PAULX Sharpe Ratio Rank: 41
PAULX Sortino Ratio Rank: 40
PAULX Omega Ratio Rank: 41
PAULX Calmar Ratio Rank: 40
PAULX Martin Ratio Rank: 53

PREIX

PREIX Risk / Return Rank: 72
PREIX Sharpe Ratio Rank: 74
PREIX Sortino Ratio Rank: 66
PREIX Omega Ratio Rank: 66
PREIX Calmar Ratio Rank: 73
PREIX Martin Ratio Rank: 82

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.

PAULX vs. PREIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price U.S. Large-Cap Core Fund (PAULX) and T. Rowe Price Equity Index 500 Fund (PREIX). 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.

	PAULX	PREIX	Difference
Sharpe ratio: Return per unit of total volatility	1.88	2.50	-0.61
Sortino ratio: Return per unit of downside risk	2.65	3.40	-0.75
Omega ratio: Gain probability vs. loss probability	1.35	1.45	-0.11
Calmar ratio: Return relative to maximum drawdown	2.40	3.32	-0.92
Martin ratio: Return relative to average drawdown	10.83	15.47	-4.64
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PAULX vs. PREIX - Sharpe Ratio Comparison

The current PAULX Sharpe Ratio is 1.88, which is comparable to the PREIX Sharpe Ratio of 2.50. The chart below compares the historical Sharpe Ratios of PAULX and PREIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	PAULX	PREIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.88	2.50	-0.61
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.73	0.83	-0.10
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.78	0.85	-0.07
Sharpe Ratio (All Time) Calculated using the full available price history	0.86	0.61	+0.25

Drawdowns

PAULX vs. PREIX - Drawdown Comparison

The maximum PAULX drawdown since its inception was -33.69%, smaller than the maximum PREIX drawdown of -55.32%. Use the drawdown chart below to compare losses from any high point for PAULX and PREIX.

Drawdown Indicators

	PAULX	PREIX	Difference
Max Drawdown Largest peak-to-trough decline	-33.69%	-55.32%	+21.63%
Max Drawdown (1Y) Largest decline over 1 year	-8.61%	-8.93%	+0.32%
Max Drawdown (3Y) Largest decline over 3 years	-17.33%	-18.78%	+1.45%
Max Drawdown (5Y) Largest decline over 5 years	-23.11%	-24.60%	+1.49%
Max Drawdown (10Y) Largest decline over 10 years	-33.69%	-33.81%	+0.12%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-3.69%	-8.73%	+5.04%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.90%	1.91%	-0.01%

Volatility

PAULX vs. PREIX - Volatility Comparison

T. Rowe Price U.S. Large-Cap Core Fund (PAULX) and T. Rowe Price Equity Index 500 Fund (PREIX) have volatilities of 2.96% and 2.83%, 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

	PAULX	PREIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.96%	2.83%	+0.13%
Volatility (6M) Calculated over the trailing 6-month period	8.41%	8.98%	-0.57%
Volatility (1Y) Calculated over the trailing 1-year period	10.98%	11.87%	-0.89%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.97%	17.00%	-1.03%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.98%	18.11%	-1.13%

PAULX vs. PREIX - Expense Ratio Comparison

PAULX has a 0.97% expense ratio, which is higher than PREIX's 0.15% expense ratio.

Dividends

PAULX vs. PREIX - Dividend Comparison

PAULX's dividend yield for the trailing twelve months is around 6.79%, more than PREIX's 2.10% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PAULX T. Rowe Price U.S. Large-Cap Core Fund	6.79%	7.40%	6.30%	0.16%	4.05%	6.85%	0.59%	3.21%	7.52%	2.10%	0.59%	5.25%
PREIX T. Rowe Price Equity Index 500 Fund	2.10%	2.32%	1.17%	1.32%	1.50%	1.56%	1.97%	2.13%	2.60%	1.30%	2.03%	2.02%

Frequently Asked Questions

Can I hold both PAULX and PREIX in my portfolio?

With a correlation of 0.95, PAULX and PREIX 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, PAULX or PREIX?

PAULX has higher volatility (2.96%) compared to PREIX (2.83%). In terms of maximum drawdown, PAULX dropped -33.69% vs PREIX's -55.32%.

Which has better risk-adjusted returns?

PREIX currently has the higher Sharpe Ratio (2.50 vs 1.88), 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.