PLFIX vs. PSSMX

Last updated Jun 4, 2026

PLFIX (Principal Large Cap S&P 500 Index Fund Institutional) and PSSMX (Principal SmallCap S&P 600 Index Fund) are both mutual funds - PLFIX is a S&P 500 fund tracking the S&P 500 Index, while PSSMX is a Small Cap Blend Equities fund managed by Principal. Over the past 10 years, PLFIX returned 15.64%/yr vs 10.83%/yr for PSSMX. Their correlation of 0.85 suggests significant overlap in exposure. PLFIX charges 0.11%/yr vs 0.73%/yr for PSSMX.

Performance

PLFIX vs. PSSMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Principal Large Cap S&P 500 Index Fund Institutional (PLFIX) and Principal SmallCap S&P 600 Index Fund (PSSMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PLFIX achieves a 11.68% return, which is significantly lower than PSSMX's 15.97% return. Over the past 10 years, PLFIX has outperformed PSSMX with an annualized return of 15.64%, while PSSMX has yielded a comparatively lower 10.83% annualized return.

PLFIX

• 1D: 0.14%
• 1M: 5.79%
• YTD: 11.68%
• 6M: 11.75%
• 1Y: 28.92%
• 3Y*: 23.21%
• 5Y*: 14.45%
• 10Y*: 15.64%

PSSMX

• 1D: 0.85%
• 1M: 2.53%
• YTD: 15.97%
• 6M: 14.78%
• 1Y: 31.83%
• 3Y*: 16.96%
• 5Y*: 6.80%
• 10Y*: 10.83%

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

PLFIX vs. PSSMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PLFIX Principal Large Cap S&P 500 Index Fund Institutional	11.68%	17.77%	26.77%	26.00%	-18.21%	28.25%	18.11%	31.35%	-4.66%	21.65%
PSSMX Principal SmallCap S&P 600 Index Fund	15.97%	5.34%	16.60%	15.18%	-16.69%	25.39%	10.65%	21.99%	-9.42%	12.46%

Correlation

The correlation between PLFIX and PSSMX is 0.74, 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	0.74
Correlation (3Y) Calculated over the trailing 3-year period	0.74
Correlation (5Y) Calculated over the trailing 5-year period	0.79
Correlation (10Y) Calculated over the trailing 10-year period	0.78
Correlation (All Time) Calculated using the full available price history since Mar 1, 2001	0.85

The correlation between PLFIX and PSSMX shifts across timeframes, from 0.74 (1 year) to 0.85 (all time), reflecting how their relationship changes across market environments.

Return for Risk

PLFIX vs. PSSMX — Risk / Return Rank

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

PLFIX

PLFIX Risk / Return Rank: 73
PLFIX Sharpe Ratio Rank: 75
PLFIX Sortino Ratio Rank: 67
PLFIX Omega Ratio Rank: 68
PLFIX Calmar Ratio Rank: 73
PLFIX Martin Ratio Rank: 83

PSSMX

PSSMX Risk / Return Rank: 56
PSSMX Sharpe Ratio Rank: 45
PSSMX Sortino Ratio Rank: 45
PSSMX Omega Ratio Rank: 40
PSSMX Calmar Ratio Rank: 83
PSSMX Martin Ratio Rank: 67

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.

PLFIX vs. PSSMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Principal Large Cap S&P 500 Index Fund Institutional (PLFIX) and Principal SmallCap S&P 600 Index Fund (PSSMX). 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.

	PLFIX	PSSMX	Difference
Sharpe ratio Return per unit of total volatility	2.52	1.95	+0.56
Sortino ratio Return per unit of downside risk	3.42	2.84	+0.58
Omega ratio Gain probability vs. loss probability	1.46	1.34	+0.12
Calmar ratio Return relative to maximum drawdown	3.34	3.89	-0.55
Martin ratio Return relative to average drawdown	15.63	13.00	+2.63
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PLFIX vs. PSSMX - Sharpe Ratio Comparison

The current PLFIX Sharpe Ratio is 2.52, which is comparable to the PSSMX Sharpe Ratio of 1.95. The chart below compares the historical Sharpe Ratios of PLFIX and PSSMX, 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

	PLFIX	PSSMX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.52	1.95	+0.56
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.86	0.31	+0.54
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.90	0.47	+0.42
Sharpe Ratio (All Time) Calculated using the full available price history	0.49	0.41	+0.08

Drawdowns

PLFIX vs. PSSMX - Drawdown Comparison

The maximum PLFIX drawdown since its inception was -55.28%, smaller than the maximum PSSMX drawdown of -58.43%. Use the drawdown chart below to compare losses from any high point for PLFIX and PSSMX.

Drawdown Indicators

	PLFIX	PSSMX	Difference
Max Drawdown Largest peak-to-trough decline	-55.28%	-58.43%	+3.15%
Max Drawdown (1Y) Largest decline over 1 year	-8.90%	-8.76%	-0.14%
Max Drawdown (3Y) Largest decline over 3 years	-18.77%	-24.30%	+5.53%
Max Drawdown (5Y) Largest decline over 5 years	-24.58%	-27.01%	+2.43%
Max Drawdown (10Y) Largest decline over 10 years	-33.77%	-44.85%	+11.08%
Current Drawdown Current decline from peak	0.00%	-0.07%	+0.07%
Average Drawdown Average peak-to-trough decline	-8.86%	-9.52%	+0.66%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.90%	2.62%	-0.72%

Volatility

PLFIX vs. PSSMX - Volatility Comparison

The current volatility for Principal Large Cap S&P 500 Index Fund Institutional (PLFIX) is 2.82%, while Principal SmallCap S&P 600 Index Fund (PSSMX) has a volatility of 4.47%. This indicates that PLFIX experiences smaller price fluctuations and is considered to be less risky than PSSMX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PLFIX	PSSMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.82%	4.47%	-1.65%
Volatility (6M) Calculated over the trailing 6-month period	8.96%	11.69%	-2.73%
Volatility (1Y) Calculated over the trailing 1-year period	11.84%	17.46%	-5.62%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.91%	21.76%	-4.85%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.52%	22.92%	-5.40%

PLFIX vs. PSSMX - Expense Ratio Comparison

PLFIX has a 0.11% expense ratio, which is lower than PSSMX's 0.73% expense ratio.

Dividends

PLFIX vs. PSSMX - Dividend Comparison

PLFIX's dividend yield for the trailing twelve months is around 2.64%, less than PSSMX's 8.61% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PLFIX Principal Large Cap S&P 500 Index Fund Institutional	2.64%	2.95%	4.28%	4.13%	2.96%	13.60%	7.57%	3.83%	7.52%	7.01%	3.23%	2.69%
PSSMX Principal SmallCap S&P 600 Index Fund	8.61%	9.98%	15.91%	3.75%	10.45%	8.23%	1.67%	6.56%	13.08%	6.03%	6.15%	8.07%

Frequently Asked Questions

Can I hold both PLFIX and PSSMX in my portfolio?

PLFIX and PSSMX have a correlation of 0.74, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PLFIX or PSSMX?

PSSMX has higher volatility (4.47%) compared to PLFIX (2.82%). In terms of maximum drawdown, PLFIX dropped -55.28% vs PSSMX's -58.43%.

Which has better risk-adjusted returns?

PLFIX currently has the higher Sharpe Ratio (2.52 vs 1.95), 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.