TRSSX vs. PDRDX

Last updated Jun 13, 2026

TRSSX (T. Rowe Price Institutional Small Cap Stock Fund) and PDRDX (Principal Diversified Real Asset Fund) are both mutual funds - TRSSX is a Small Cap Growth Equities fund managed by T. Rowe Price, while PDRDX is a Global Allocation fund managed by Principal. Over the past 10 years, TRSSX returned 11.86%/yr vs 6.35%/yr for PDRDX. A 0.70 correlation means they provide meaningful diversification when combined. TRSSX charges 0.66%/yr vs 0.83%/yr for PDRDX.

Performance

TRSSX vs. PDRDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price Institutional Small Cap Stock Fund (TRSSX) and Principal Diversified Real Asset Fund (PDRDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TRSSX achieves a 12.55% return, which is significantly higher than PDRDX's 11.44% return. Over the past 10 years, TRSSX has outperformed PDRDX with an annualized return of 11.86%, while PDRDX has yielded a comparatively lower 6.35% annualized return.

TRSSX

• 1D: 3.51%
• 1M: 0.85%
• YTD: 12.55%
• 6M: 10.15%
• 1Y: 25.11%
• 3Y*: 14.18%
• 5Y*: 4.71%
• 10Y*: 11.86%

PDRDX

• 1D: 0.74%
• 1M: -2.51%
• YTD: 11.44%
• 6M: 12.28%
• 1Y: 19.27%
• 3Y*: 10.82%
• 5Y*: 5.81%
• 10Y*: 6.35%

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

TRSSX vs. PDRDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TRSSX T. Rowe Price Institutional Small Cap Stock Fund	12.55%	8.21%	10.93%	17.65%	-23.36%	16.81%	25.07%	33.96%	-3.07%	15.41%
PDRDX Principal Diversified Real Asset Fund	11.44%	14.63%	3.09%	3.22%	-6.19%	17.30%	3.97%	15.02%	-7.90%	10.18%

Correlation

The correlation between TRSSX and PDRDX is 0.59, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.59
Correlation (3Y) Calculated over the trailing 3-year period	0.64
Correlation (5Y) Calculated over the trailing 5-year period	0.67
Correlation (10Y) Calculated over the trailing 10-year period	0.68
Correlation (All Time) Calculated using the full available price history since Mar 17, 2010	0.70

The correlation between TRSSX and PDRDX shifts across timeframes, from 0.59 (1 year) to 0.70 (all time), reflecting how their relationship changes across market environments.

Return for Risk

TRSSX vs. PDRDX — Risk / Return Rank

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

TRSSX

TRSSX Risk / Return Rank: 37
TRSSX Sharpe Ratio Rank: 30
TRSSX Sortino Ratio Rank: 33
TRSSX Omega Ratio Rank: 28
TRSSX Calmar Ratio Rank: 47
TRSSX Martin Ratio Rank: 47

PDRDX

PDRDX Risk / Return Rank: 79
PDRDX Sharpe Ratio Rank: 76
PDRDX Sortino Ratio Rank: 73
PDRDX Omega Ratio Rank: 74
PDRDX Calmar Ratio Rank: 84
PDRDX Martin Ratio Rank: 87

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.

TRSSX vs. PDRDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Institutional Small Cap Stock Fund (TRSSX) and Principal Diversified Real Asset Fund (PDRDX). 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.

	TRSSX	PDRDX	Difference
Sharpe ratio: Return per unit of total volatility	1.27	2.13	-0.86
Sortino ratio: Return per unit of downside risk	1.94	2.92	-0.98
Omega ratio: Gain probability vs. loss probability	1.23	1.39	-0.16
Calmar ratio: Return relative to maximum drawdown	2.18	3.38	-1.19
Martin ratio: Return relative to average drawdown	8.21	13.83	-5.61

TRSSX vs. PDRDX - Sharpe Ratio Comparison

The current TRSSX Sharpe Ratio is 1.27, which is lower than the PDRDX Sharpe Ratio of 2.13. The chart below compares the historical Sharpe Ratios of TRSSX and PDRDX, 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

TRSSX vs. PDRDX - Drawdown Comparison

The maximum TRSSX drawdown since its inception was -56.38%, which is greater than PDRDX's maximum drawdown of -28.55%. Use the drawdown chart below to compare losses from any high point for TRSSX and PDRDX.

Drawdown Indicators

	TRSSX	PDRDX	Difference
Max Drawdown Largest peak-to-trough decline	-56.38%	-28.55%	-27.83%
Max Drawdown (1Y) Largest decline over 1 year	-10.73%	-5.88%	-4.85%
Max Drawdown (3Y) Largest decline over 3 years	-30.88%	-10.94%	-19.94%
Max Drawdown (5Y) Largest decline over 5 years	-32.12%	-19.35%	-12.77%
Max Drawdown (10Y) Largest decline over 10 years	-37.85%	-28.55%	-9.30%
Current Drawdown Current decline from peak	-0.22%	-2.93%	+2.71%
Average Drawdown Average peak-to-trough decline	-9.00%	-5.97%	-3.03%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.82%	1.43%	+1.39%

Volatility

TRSSX vs. PDRDX - Volatility Comparison

T. Rowe Price Institutional Small Cap Stock Fund (TRSSX) has a higher volatility of 6.59% compared to Principal Diversified Real Asset Fund (PDRDX) at 2.94%. This indicates that TRSSX's price experiences larger fluctuations and is considered to be riskier than PDRDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TRSSX	PDRDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.59%	2.94%	+3.65%
Volatility (6M) Calculated over the trailing 6-month period	14.59%	7.83%	+6.76%
Volatility (1Y) Calculated over the trailing 1-year period	18.49%	9.31%	+9.18%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.31%	11.02%	+11.29%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.59%	10.81%	+10.78%

TRSSX vs. PDRDX - Expense Ratio Comparison

TRSSX has a 0.66% expense ratio, which is lower than PDRDX's 0.83% expense ratio.

Dividends

TRSSX vs. PDRDX - Dividend Comparison

TRSSX's dividend yield for the trailing twelve months is around 9.39%, more than PDRDX's 3.85% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PDRDX Principal Diversified Real Asset Fund	3.85%	4.19%	2.43%	2.52%	12.88%	6.56%	0.52%	2.36%	3.47%	2.21%	2.61%	0.99%
TRSSX T. Rowe Price Institutional Small Cap Stock Fund	9.39%	10.57%	19.63%	5.45%	5.37%	8.52%	4.54%	6.13%	13.45%	6.53%	0.80%	7.07%

Frequently Asked Questions

Can I hold both TRSSX and PDRDX in my portfolio?

TRSSX and PDRDX have a correlation of 0.59, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, TRSSX or PDRDX?

TRSSX has higher volatility (6.59%) compared to PDRDX (2.94%). In terms of maximum drawdown, TRSSX dropped -56.38% vs PDRDX's -28.55%.

Which has better risk-adjusted returns?

PDRDX currently has the higher Sharpe Ratio (2.13 vs 1.27), 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.