TQGIX vs. PREIX

Last updated Jun 24, 2026

TQGIX (T. Rowe Price QM Global Equity Fund) and PREIX (T. Rowe Price Equity Index 500 Fund) are both mutual funds - TQGIX is a Global Equities fund managed by T. Rowe Price, while PREIX is a Large Cap Blend Equities fund tracking the S&P 500 Index. Over the past 5 years, TQGIX returned 12.91%/yr vs 13.41%/yr for PREIX. With a 0.95 correlation, they move nearly in lockstep. TQGIX charges 0.58%/yr vs 0.15%/yr for PREIX.

Performance

TQGIX vs. PREIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price QM Global Equity Fund (TQGIX) 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, TQGIX achieves a 13.00% return, which is significantly higher than PREIX's 9.68% return.

TQGIX

• 1D: -0.08%
• 1M: 1.57%
• YTD: 13.00%
• 6M: 12.31%
• 1Y: 28.92%
• 3Y*: 22.50%
• 5Y*: 12.91%
• 10Y*: —

PREIX

• 1D: -0.37%
• 1M: 0.08%
• YTD: 9.68%
• 6M: 8.67%
• 1Y: 25.27%
• 3Y*: 21.17%
• 5Y*: 13.41%
• 10Y*: 15.55%

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

TQGIX vs. PREIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TQGIX T. Rowe Price QM Global Equity Fund	13.00%	22.82%	18.08%	23.86%	-17.12%	19.87%	15.49%	27.89%	-9.95%	24.18%
PREIX T. Rowe Price Equity Index 500 Fund	9.68%	17.66%	24.78%	26.07%	-18.27%	28.48%	18.17%	31.47%	-4.59%	21.01%

Correlation

The correlation between TQGIX and PREIX is 0.96 - 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	0.96
Correlation (3Y) Calculated over the trailing 3-year period	0.96
Correlation (5Y) Calculated over the trailing 5-year period	0.96
Correlation (All Time) Calculated using the full available price history since Jan 3, 2017	0.95

The correlation between TQGIX and PREIX has been stable across timeframes, ranging from 0.95 to 0.96 - a consistent structural relationship.

Return for Risk

TQGIX vs. PREIX — Risk / Return Rank

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

TQGIX

TQGIX Risk / Return Rank: 72
TQGIX Sharpe Ratio Rank: 76
TQGIX Sortino Ratio Rank: 71
TQGIX Omega Ratio Rank: 71
TQGIX Calmar Ratio Rank: 67
TQGIX Martin Ratio Rank: 76

PREIX

PREIX Risk / Return Rank: 64
PREIX Sharpe Ratio Rank: 62
PREIX Sortino Ratio Rank: 56
PREIX Omega Ratio Rank: 58
PREIX Calmar Ratio Rank: 66
PREIX Martin Ratio Rank: 77

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.

TQGIX vs. PREIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price QM Global Equity Fund (TQGIX) 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.

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.

	TQGIX	PREIX	Difference
Sharpe ratio: Return per unit of total volatility	2.34	2.13	+0.21
Sortino ratio: Return per unit of downside risk	3.18	2.88	+0.30
Omega ratio: Gain probability vs. loss probability	1.43	1.39	+0.04
Calmar ratio: Return relative to maximum drawdown	3.01	2.98	+0.03
Martin ratio: Return relative to average drawdown	13.41	13.43	-0.01

TQGIX vs. PREIX - Sharpe Ratio Comparison

The current TQGIX Sharpe Ratio is 2.34, which is comparable to the PREIX Sharpe Ratio of 2.13. The chart below compares the historical Sharpe Ratios of TQGIX 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.

Drawdowns

TQGIX vs. PREIX - Drawdown Comparison

The maximum TQGIX drawdown since its inception was -32.97%, smaller than the maximum PREIX drawdown of -55.32%. Use the drawdown chart below to compare losses from any high point for TQGIX and PREIX.

Drawdown Indicators

	TQGIX	PREIX	Difference
Max Drawdown Largest peak-to-trough decline	-32.97%	-55.32%	+22.35%
Max Drawdown (1Y) Largest decline over 1 year	-9.96%	-8.93%	-1.03%
Max Drawdown (3Y) Largest decline over 3 years	-15.92%	-18.78%	+2.86%
Max Drawdown (5Y) Largest decline over 5 years	-25.44%	-24.60%	-0.84%
Max Drawdown (10Y) Largest decline over 10 years	—	-33.81%	—
Current Drawdown Current decline from peak	-0.74%	-1.73%	+0.99%
Average Drawdown Average peak-to-trough decline	-4.79%	-8.71%	+3.92%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.23%	1.98%	+0.25%

Volatility

TQGIX vs. PREIX - Volatility Comparison

T. Rowe Price QM Global Equity Fund (TQGIX) has a higher volatility of 4.98% compared to T. Rowe Price Equity Index 500 Fund (PREIX) at 4.68%. This indicates that TQGIX's price experiences larger fluctuations and is considered to be riskier than PREIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TQGIX	PREIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.98%	4.68%	+0.30%
Volatility (6M) Calculated over the trailing 6-month period	10.68%	9.84%	+0.84%
Volatility (1Y) Calculated over the trailing 1-year period	12.83%	12.51%	+0.32%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.44%	17.09%	-1.65%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.75%	18.15%	-1.40%

TQGIX vs. PREIX - Expense Ratio Comparison

TQGIX has a 0.58% expense ratio, which is higher than PREIX's 0.15% expense ratio.

Dividends

TQGIX vs. PREIX - Dividend Comparison

TQGIX's dividend yield for the trailing twelve months is around 3.07%, more than PREIX's 2.14% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PREIX T. Rowe Price Equity Index 500 Fund	2.14%	2.32%	1.17%	1.32%	1.50%	1.56%	1.97%	2.13%	2.60%	1.30%	2.03%	2.02%
TQGIX T. Rowe Price QM Global Equity Fund	3.07%	3.47%	4.48%	3.04%	21.41%	0.87%	0.93%	1.41%	1.96%	1.49%	0.00%	0.00%

Frequently Asked Questions

Can I hold both TQGIX and PREIX in my portfolio?

With a correlation of 0.96, TQGIX 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, TQGIX or PREIX?

TQGIX has higher volatility (4.98%) compared to PREIX (4.68%). In terms of maximum drawdown, TQGIX dropped -32.97% vs PREIX's -55.32%.

Which has better risk-adjusted returns?

TQGIX currently has the higher Sharpe Ratio (2.34 vs 2.13), 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.