PDRDX vs. TRSSX

Last updated Jun 13, 2026

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

Performance

PDRDX vs. TRSSX - Performance Comparison

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

Returns By Period

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

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%

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%

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

PDRDX vs. TRSSX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
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%
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%

Correlation

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

Return for Risk

PDRDX vs. TRSSX — Risk / Return Rank

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

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

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

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.

PDRDX vs. TRSSX - Risk-Adjusted Trends Comparison

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

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

PDRDX vs. TRSSX - Sharpe Ratio Comparison

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

PDRDX vs. TRSSX - Drawdown Comparison

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

Drawdown Indicators

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

Volatility

PDRDX vs. TRSSX - Volatility Comparison

The current volatility for Principal Diversified Real Asset Fund (PDRDX) is 2.94%, while T. Rowe Price Institutional Small Cap Stock Fund (TRSSX) has a volatility of 6.59%. This indicates that PDRDX experiences smaller price fluctuations and is considered to be less risky than TRSSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

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

PDRDX vs. TRSSX - Expense Ratio Comparison

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

Dividends

PDRDX vs. TRSSX - Dividend Comparison

PDRDX's dividend yield for the trailing twelve months is around 3.85%, less than TRSSX's 9.39% 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 PDRDX and TRSSX in my portfolio?

PDRDX and TRSSX 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, PDRDX or TRSSX?

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

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.