PRDSX vs. FECGX

Last updated Jun 4, 2026

PRDSX (T. Rowe Price QM U.S. Small-Cap Growth Equity Fund) and FECGX (Fidelity Small Cap Growth Index Fund) are both Small Cap Growth Equities funds. Over the past 5 years, PRDSX returned 7.58%/yr vs 6.22%/yr for FECGX. With a 0.97 correlation, they move nearly in lockstep. PRDSX charges 0.78%/yr vs 0.05%/yr for FECGX.

Performance

PRDSX vs. FECGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price QM U.S. Small-Cap Growth Equity Fund (PRDSX) and Fidelity Small Cap Growth Index Fund (FECGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PRDSX achieves a 14.76% return, which is significantly lower than FECGX's 18.46% return.

PRDSX

• 1D: 0.93%
• 1M: 3.81%
• YTD: 14.76%
• 6M: 13.56%
• 1Y: 28.98%
• 3Y*: 16.49%
• 5Y*: 7.58%
• 10Y*: 11.71%

FECGX

• 1D: 0.87%
• 1M: 5.85%
• YTD: 18.46%
• 6M: 16.79%
• 1Y: 39.39%
• 3Y*: 18.78%
• 5Y*: 6.22%
• 10Y*: —

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

PRDSX vs. FECGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
PRDSX T. Rowe Price QM U.S. Small-Cap Growth Equity Fund	14.76%	10.10%	12.97%	21.15%	-22.49%	11.15%	23.85%	6.92%
FECGX Fidelity Small Cap Growth Index Fund	18.46%	13.04%	15.26%	18.90%	-26.17%	2.83%	34.41%	7.11%

Correlation

The correlation between PRDSX and FECGX 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	0.97
Correlation (All Time) Calculated using the full available price history since Jul 18, 2019	0.97

The correlation between PRDSX and FECGX has been stable across timeframes, ranging from 0.96 to 0.97 - a consistent structural relationship.

Return for Risk

PRDSX vs. FECGX — Risk / Return Rank

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

PRDSX

PRDSX Risk / Return Rank: 37
PRDSX Sharpe Ratio Rank: 32
PRDSX Sortino Ratio Rank: 32
PRDSX Omega Ratio Rank: 30
PRDSX Calmar Ratio Rank: 45
PRDSX Martin Ratio Rank: 48

FECGX

FECGX Risk / Return Rank: 45
FECGX Sharpe Ratio Rank: 45
FECGX Sortino Ratio Rank: 41
FECGX Omega Ratio Rank: 37
FECGX Calmar Ratio Rank: 55
FECGX Martin Ratio Rank: 49

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.

PRDSX vs. FECGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price QM U.S. Small-Cap Growth Equity Fund (PRDSX) and Fidelity Small Cap Growth Index Fund (FECGX). 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.

	PRDSX	FECGX	Difference
Sharpe ratio: Return per unit of total volatility	1.64	1.96	-0.33
Sortino ratio: Return per unit of downside risk	2.35	2.68	-0.33
Omega ratio: Gain probability vs. loss probability	1.28	1.32	-0.04
Calmar ratio: Return relative to maximum drawdown	2.55	2.83	-0.28
Martin ratio: Return relative to average drawdown	9.89	10.20	-0.31
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PRDSX vs. FECGX - Sharpe Ratio Comparison

The current PRDSX Sharpe Ratio is 1.64, which is comparable to the FECGX Sharpe Ratio of 1.96. The chart below compares the historical Sharpe Ratios of PRDSX and FECGX, 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

	PRDSX	FECGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.64	1.96	-0.33
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.36	0.25	+0.10
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.55	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.37	0.39	-0.02

Drawdowns

PRDSX vs. FECGX - Drawdown Comparison

The maximum PRDSX drawdown since its inception was -58.95%, which is greater than FECGX's maximum drawdown of -41.85%. Use the drawdown chart below to compare losses from any high point for PRDSX and FECGX.

Drawdown Indicators

	PRDSX	FECGX	Difference
Max Drawdown Largest peak-to-trough decline	-58.95%	-41.85%	-17.10%
Max Drawdown (1Y) Largest decline over 1 year	-12.08%	-14.81%	+2.73%
Max Drawdown (3Y) Largest decline over 3 years	-25.84%	-28.45%	+2.61%
Max Drawdown (5Y) Largest decline over 5 years	-33.17%	-40.34%	+7.17%
Max Drawdown (10Y) Largest decline over 10 years	-37.61%	—	—
Current Drawdown Current decline from peak	-0.33%	0.00%	-0.33%
Average Drawdown Average peak-to-trough decline	-14.16%	-15.76%	+1.60%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.11%	4.10%	-0.99%

Volatility

PRDSX vs. FECGX - Volatility Comparison

The current volatility for T. Rowe Price QM U.S. Small-Cap Growth Equity Fund (PRDSX) is 6.03%, while Fidelity Small Cap Growth Index Fund (FECGX) has a volatility of 6.44%. This indicates that PRDSX experiences smaller price fluctuations and is considered to be less risky than FECGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PRDSX	FECGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.03%	6.44%	-0.41%
Volatility (6M) Calculated over the trailing 6-month period	14.75%	15.86%	-1.11%
Volatility (1Y) Calculated over the trailing 1-year period	18.82%	21.35%	-2.53%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.37%	24.54%	-3.17%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.51%	27.19%	-5.68%

PRDSX vs. FECGX - Expense Ratio Comparison

PRDSX has a 0.78% expense ratio, which is higher than FECGX's 0.05% expense ratio.

Dividends

PRDSX vs. FECGX - Dividend Comparison

PRDSX's dividend yield for the trailing twelve months is around 5.53%, more than FECGX's 0.46% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FECGX Fidelity Small Cap Growth Index Fund	0.46%	0.54%	1.25%	0.81%	0.80%	3.43%	1.00%	0.29%	0.00%	0.00%	0.00%	0.00%
PRDSX T. Rowe Price QM U.S. Small-Cap Growth Equity Fund	5.53%	6.35%	7.96%	2.43%	3.72%	13.97%	2.91%	4.12%	4.53%	0.10%	0.02%	1.83%

Frequently Asked Questions

Can I hold both PRDSX and FECGX in my portfolio?

With a correlation of 0.96, PRDSX and FECGX 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, PRDSX or FECGX?

FECGX has higher volatility (6.44%) compared to PRDSX (6.03%). In terms of maximum drawdown, PRDSX dropped -58.95% vs FECGX's -41.85%.

Which has better risk-adjusted returns?

FECGX currently has the higher Sharpe Ratio (1.96 vs 1.64), 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.