PREFX vs. POMIX

Last updated Jun 24, 2026

PREFX (T. Rowe Price Tax-Efficient Equity Fund) and POMIX (T. Rowe Price Total Equity Market Index Fund) are both mutual funds - PREFX is a Large Cap Growth Equities fund managed by T. Rowe Price, while POMIX is a Large Cap Blend Equities fund managed by T. Rowe Price. Over the past 10 years, PREFX returned 16.89%/yr vs 14.93%/yr for POMIX. Their correlation of 0.94 suggests significant overlap in exposure. PREFX charges 0.76%/yr vs 0.20%/yr for POMIX.

Performance

PREFX vs. POMIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price Tax-Efficient Equity Fund (PREFX) and T. Rowe Price Total Equity Market Index Fund (POMIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PREFX achieves a 4.54% return, which is significantly lower than POMIX's 10.53% return. Over the past 10 years, PREFX has outperformed POMIX with an annualized return of 16.89%, while POMIX has yielded a comparatively lower 14.93% annualized return.

PREFX

• 1D: -1.07%
• 1M: -1.21%
• YTD: 4.54%
• 6M: 3.12%
• 1Y: 18.13%
• 3Y*: 21.84%
• 5Y*: 10.98%
• 10Y*: 16.89%

POMIX

• 1D: -0.32%
• 1M: 0.72%
• YTD: 10.53%
• 6M: 9.44%
• 1Y: 26.21%
• 3Y*: 21.20%
• 5Y*: 12.38%
• 10Y*: 14.93%

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

PREFX vs. POMIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PREFX T. Rowe Price Tax-Efficient Equity Fund	4.54%	16.30%	32.37%	36.98%	-30.52%	22.19%	35.32%	36.59%	-0.46%	28.80%
POMIX T. Rowe Price Total Equity Market Index Fund	10.53%	17.09%	23.48%	26.38%	-19.64%	25.39%	19.82%	30.95%	-5.57%	19.09%

Correlation

The correlation between PREFX and POMIX is 0.92, 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	0.92
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.94
Correlation (10Y) Calculated over the trailing 10-year period	0.93
Correlation (All Time) Calculated using the full available price history since Jan 2, 2001	0.94

The correlation between PREFX and POMIX has been stable across timeframes, ranging from 0.92 to 0.94 - a consistent structural relationship.

Return for Risk

PREFX vs. POMIX — Risk / Return Rank

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

PREFX

PREFX Risk / Return Rank: 19
PREFX Sharpe Ratio Rank: 21
PREFX Sortino Ratio Rank: 21
PREFX Omega Ratio Rank: 21
PREFX Calmar Ratio Rank: 14
PREFX Martin Ratio Rank: 17

POMIX

POMIX Risk / Return Rank: 71
POMIX Sharpe Ratio Rank: 70
POMIX Sortino Ratio Rank: 66
POMIX Omega Ratio Rank: 63
POMIX Calmar Ratio Rank: 75
POMIX Martin Ratio Rank: 84

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.

PREFX vs. POMIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Tax-Efficient Equity Fund (PREFX) and T. Rowe Price Total Equity Market Index Fund (POMIX). 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.

	PREFX	POMIX	Difference
Sharpe ratio: Return per unit of total volatility	1.23	2.24	-1.01
Sortino ratio: Return per unit of downside risk	1.76	3.09	-1.33
Omega ratio: Gain probability vs. loss probability	1.22	1.40	-0.18
Calmar ratio: Return relative to maximum drawdown	1.24	3.22	-1.97
Martin ratio: Return relative to average drawdown	4.14	14.44	-10.30

PREFX vs. POMIX - Sharpe Ratio Comparison

The current PREFX Sharpe Ratio is 1.23, which is lower than the POMIX Sharpe Ratio of 2.24. The chart below compares the historical Sharpe Ratios of PREFX and POMIX, 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

PREFX vs. POMIX - Drawdown Comparison

The maximum PREFX drawdown since its inception was -56.70%, roughly equal to the maximum POMIX drawdown of -55.54%. Use the drawdown chart below to compare losses from any high point for PREFX and POMIX.

Drawdown Indicators

	PREFX	POMIX	Difference
Max Drawdown Largest peak-to-trough decline	-56.70%	-55.54%	-1.16%
Max Drawdown (1Y) Largest decline over 1 year	-16.18%	-8.83%	-7.35%
Max Drawdown (3Y) Largest decline over 3 years	-23.06%	-19.67%	-3.39%
Max Drawdown (5Y) Largest decline over 5 years	-35.95%	-25.56%	-10.39%
Max Drawdown (10Y) Largest decline over 10 years	-35.95%	-35.05%	-0.90%
Current Drawdown Current decline from peak	-4.03%	-1.32%	-2.71%
Average Drawdown Average peak-to-trough decline	-10.25%	-10.63%	+0.38%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.79%	1.94%	+2.85%

Volatility

PREFX vs. POMIX - Volatility Comparison

T. Rowe Price Tax-Efficient Equity Fund (PREFX) has a higher volatility of 6.22% compared to T. Rowe Price Total Equity Market Index Fund (POMIX) at 4.76%. This indicates that PREFX's price experiences larger fluctuations and is considered to be riskier than POMIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PREFX	POMIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.22%	4.76%	+1.46%
Volatility (6M) Calculated over the trailing 6-month period	13.36%	10.33%	+3.03%
Volatility (1Y) Calculated over the trailing 1-year period	16.38%	12.74%	+3.64%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.77%	17.64%	+4.13%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.32%	18.56%	+2.76%

PREFX vs. POMIX - Expense Ratio Comparison

PREFX has a 0.76% expense ratio, which is higher than POMIX's 0.20% expense ratio.

Dividends

PREFX vs. POMIX - Dividend Comparison

PREFX has not paid dividends to shareholders, while POMIX's dividend yield for the trailing twelve months is around 1.92%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
POMIX T. Rowe Price Total Equity Market Index Fund	1.92%	2.13%	1.76%	1.46%	1.49%	1.53%	1.55%	1.91%	2.89%	0.20%	2.41%	2.08%
PREFX T. Rowe Price Tax-Efficient Equity Fund	0.00%	0.00%	0.85%	0.61%	0.88%	2.09%	1.98%	0.94%	1.36%	2.82%	0.22%	0.55%

Frequently Asked Questions

Can I hold both PREFX and POMIX in my portfolio?

With a correlation of 0.92, PREFX and POMIX 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, PREFX or POMIX?

PREFX has higher volatility (6.22%) compared to POMIX (4.76%). In terms of maximum drawdown, PREFX dropped -56.70% vs POMIX's -55.54%.

Which has better risk-adjusted returns?

POMIX currently has the higher Sharpe Ratio (2.24 vs 1.23), 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.