PREIX vs. WBREOX

Last updated Jun 4, 2026

PREIX (T. Rowe Price Equity Index 500 Fund) and WBREOX (CIT: BlackRock Equity Index Fund Class 1) are both Large Cap Blend Equities funds. Over the past year, PREIX returned 28.74% vs 28.98% for WBREOX. A 0.80 correlation means they provide meaningful diversification when combined. PREIX charges 0.15%/yr vs 0.02%/yr for WBREOX.

Performance

PREIX vs. WBREOX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price Equity Index 500 Fund (PREIX) and CIT: BlackRock Equity Index Fund Class 1 (WBREOX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with PREIX having a 11.61% return and WBREOX slightly higher at 11.70%.

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%

WBREOX

• 1D: 0.13%
• 1M: 5.80%
• YTD: 11.70%
• 6M: 11.74%
• 1Y: 28.98%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

PREIX vs. WBREOX - Yearly Performance Comparison

	2026 (YTD)	2025
PREIX T. Rowe Price Equity Index 500 Fund	11.61%	16.44%
WBREOX CIT: BlackRock Equity Index Fund Class 1	11.70%	16.64%

Correlation

The correlation between PREIX and WBREOX is 0.85, 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	0.85
Correlation (All Time) Calculated using the full available price history since Jan 6, 2025	0.80

The correlation between PREIX and WBREOX has been stable across timeframes, ranging from 0.80 to 0.85 - a consistent structural relationship.

Return for Risk

PREIX vs. WBREOX — Risk / Return Rank

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

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

WBREOX

WBREOX Risk / Return Rank: 84
WBREOX Sharpe Ratio Rank: 86
WBREOX Sortino Ratio Rank: 83
WBREOX Omega Ratio Rank: 78
WBREOX Calmar Ratio Rank: 83
WBREOX Martin Ratio Rank: 88

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.

PREIX vs. WBREOX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Equity Index 500 Fund (PREIX) and CIT: BlackRock Equity Index Fund Class 1 (WBREOX). 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.

	PREIX	WBREOX	Difference
Sharpe ratio: Return per unit of total volatility	2.50	2.80	-0.30
Sortino ratio: Return per unit of downside risk	3.40	3.94	-0.54
Omega ratio: Gain probability vs. loss probability	1.45	1.51	-0.05
Calmar ratio: Return relative to maximum drawdown	3.32	3.85	-0.53
Martin ratio: Return relative to average drawdown	15.47	17.42	-1.95
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PREIX vs. WBREOX - Sharpe Ratio Comparison

The current PREIX Sharpe Ratio is 2.50, which is comparable to the WBREOX Sharpe Ratio of 2.80. The chart below compares the historical Sharpe Ratios of PREIX and WBREOX, 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

	PREIX	WBREOX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.50	2.80	-0.30
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.83	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.85	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.61	1.26	-0.64

Drawdowns

PREIX vs. WBREOX - Drawdown Comparison

The maximum PREIX drawdown since its inception was -55.32%, which is greater than WBREOX's maximum drawdown of -19.07%. Use the drawdown chart below to compare losses from any high point for PREIX and WBREOX.

Drawdown Indicators

	PREIX	WBREOX	Difference
Max Drawdown Largest peak-to-trough decline	-55.32%	-19.07%	-36.25%
Max Drawdown (1Y) Largest decline over 1 year	-8.93%	-8.89%	-0.04%
Max Drawdown (3Y) Largest decline over 3 years	-18.78%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-24.60%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-33.81%	—	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-8.73%	-2.60%	-6.13%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.91%	1.89%	+0.02%

Volatility

PREIX vs. WBREOX - Volatility Comparison

T. Rowe Price Equity Index 500 Fund (PREIX) and CIT: BlackRock Equity Index Fund Class 1 (WBREOX) have volatilities of 2.83% 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

	PREIX	WBREOX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.83%	2.83%	0.00%
Volatility (6M) Calculated over the trailing 6-month period	8.98%	9.40%	-0.42%
Volatility (1Y) Calculated over the trailing 1-year period	11.87%	12.22%	-0.35%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.00%	18.64%	-1.64%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.11%	18.64%	-0.53%

PREIX vs. WBREOX - Expense Ratio Comparison

PREIX has a 0.15% expense ratio, which is higher than WBREOX's 0.02% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

PREIX vs. WBREOX - Dividend Comparison

PREIX's dividend yield for the trailing twelve months is around 2.10%, while WBREOX has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
WBREOX CIT: BlackRock Equity Index Fund Class 1	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both PREIX and WBREOX in my portfolio?

PREIX and WBREOX have a correlation of 0.85, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PREIX or WBREOX?

WBREOX has higher volatility (2.83%) compared to PREIX (2.83%). In terms of maximum drawdown, PREIX dropped -55.32% vs WBREOX's -19.07%.

Which has better risk-adjusted returns?

WBREOX currently has the higher Sharpe Ratio (2.80 vs 2.50), 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.