PLFMX vs. PMDIX

Last updated Jun 23, 2026

PLFMX (Principal LargeCap S&P 500 Index Fund) and PMDIX (Principal Small-MidCap Dividend Income Fund) are both mutual funds - PLFMX is a S&P 500 fund tracking the S&P 500 Index, while PMDIX is a Mid Cap Value Equities fund managed by Principal. Over the past 10 years, PLFMX returned 14.91%/yr vs 10.27%/yr for PMDIX. Their correlation of 0.83 suggests significant overlap in exposure. PLFMX charges 0.72%/yr vs 0.85%/yr for PMDIX.

Performance

PLFMX vs. PMDIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Principal LargeCap S&P 500 Index Fund (PLFMX) and Principal Small-MidCap Dividend Income Fund (PMDIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PLFMX achieves a 9.86% return, which is significantly lower than PMDIX's 16.51% return. Over the past 10 years, PLFMX has outperformed PMDIX with an annualized return of 14.91%, while PMDIX has yielded a comparatively lower 10.27% annualized return.

PLFMX

• 1D: 1.08%
• 1M: 0.42%
• YTD: 9.86%
• 6M: 9.35%
• 1Y: 26.37%
• 3Y*: 20.76%
• 5Y*: 13.62%
• 10Y*: 14.91%

PMDIX

• 1D: 1.25%
• 1M: 4.05%
• YTD: 16.51%
• 6M: 14.74%
• 1Y: 28.20%
• 3Y*: 17.17%
• 5Y*: 11.48%
• 10Y*: 10.27%

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

PLFMX vs. PMDIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PLFMX Principal LargeCap S&P 500 Index Fund	9.86%	17.10%	26.06%	25.27%	-18.67%	27.57%	17.46%	30.58%	-5.14%	20.96%
PMDIX Principal Small-MidCap Dividend Income Fund	16.51%	8.63%	14.56%	18.81%	-11.66%	30.41%	-6.40%	25.38%	-13.80%	13.30%

Correlation

The correlation between PLFMX and PMDIX is 0.67, 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	0.67
Correlation (3Y) Calculated over the trailing 3-year period	0.72
Correlation (5Y) Calculated over the trailing 5-year period	0.79
Correlation (10Y) Calculated over the trailing 10-year period	0.79
Correlation (All Time) Calculated using the full available price history since Jun 7, 2011	0.83

The correlation between PLFMX and PMDIX shifts across timeframes, from 0.67 (1 year) to 0.83 (all time), reflecting how their relationship changes across market environments.

Return for Risk

PLFMX vs. PMDIX — Risk / Return Rank

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

PLFMX

PLFMX Risk / Return Rank: 62
PLFMX Sharpe Ratio Rank: 60
PLFMX Sortino Ratio Rank: 55
PLFMX Omega Ratio Rank: 57
PLFMX Calmar Ratio Rank: 63
PLFMX Martin Ratio Rank: 74

PMDIX

PMDIX Risk / Return Rank: 51
PMDIX Sharpe Ratio Rank: 48
PMDIX Sortino Ratio Rank: 55
PMDIX Omega Ratio Rank: 44
PMDIX Calmar Ratio Rank: 54
PMDIX Martin Ratio Rank: 51

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.

PLFMX vs. PMDIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Principal LargeCap S&P 500 Index Fund (PLFMX) and Principal Small-MidCap Dividend Income Fund (PMDIX). 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.

	PLFMX	PMDIX	Difference
Sharpe ratio: Return per unit of total volatility	2.10	1.89	+0.21
Sortino ratio: Return per unit of downside risk	2.85	2.85	0.00
Omega ratio: Gain probability vs. loss probability	1.38	1.33	+0.05
Calmar ratio: Return relative to maximum drawdown	2.91	2.69	+0.22
Martin ratio: Return relative to average drawdown	13.11	9.87	+3.24

PLFMX vs. PMDIX - Sharpe Ratio Comparison

The current PLFMX Sharpe Ratio is 2.10, which is comparable to the PMDIX Sharpe Ratio of 1.89. The chart below compares the historical Sharpe Ratios of PLFMX and PMDIX, 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

PLFMX vs. PMDIX - Drawdown Comparison

The maximum PLFMX drawdown since its inception was -55.62%, which is greater than PMDIX's maximum drawdown of -46.47%. Use the drawdown chart below to compare losses from any high point for PLFMX and PMDIX.

Drawdown Indicators

	PLFMX	PMDIX	Difference
Max Drawdown Largest peak-to-trough decline	-55.62%	-46.47%	-9.15%
Max Drawdown (1Y) Largest decline over 1 year	-9.00%	-10.55%	+1.55%
Max Drawdown (3Y) Largest decline over 3 years	-18.83%	-21.36%	+2.53%
Max Drawdown (5Y) Largest decline over 5 years	-24.91%	-21.36%	-3.55%
Max Drawdown (10Y) Largest decline over 10 years	-33.80%	-46.47%	+12.67%
Current Drawdown Current decline from peak	-1.38%	0.00%	-1.38%
Average Drawdown Average peak-to-trough decline	-9.98%	-5.28%	-4.70%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.00%	2.87%	-0.87%

Volatility

PLFMX vs. PMDIX - Volatility Comparison

Principal LargeCap S&P 500 Index Fund (PLFMX) and Principal Small-MidCap Dividend Income Fund (PMDIX) have volatilities of 4.77% and 4.58%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PLFMX	PMDIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.77%	4.58%	+0.19%
Volatility (6M) Calculated over the trailing 6-month period	9.92%	11.10%	-1.18%
Volatility (1Y) Calculated over the trailing 1-year period	12.48%	15.00%	-2.52%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.01%	18.80%	-1.79%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.53%	20.28%	-2.75%

PLFMX vs. PMDIX - Expense Ratio Comparison

PLFMX has a 0.72% expense ratio, which is lower than PMDIX's 0.85% expense ratio.

Dividends

PLFMX vs. PMDIX - Dividend Comparison

PLFMX's dividend yield for the trailing twelve months is around 2.19%, less than PMDIX's 2.70% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PLFMX Principal LargeCap S&P 500 Index Fund	2.19%	2.41%	3.77%	3.62%	2.28%	13.02%	7.02%	3.28%	6.80%	6.44%	2.66%	2.07%
PMDIX Principal Small-MidCap Dividend Income Fund	2.70%	3.14%	7.99%	2.37%	6.95%	0.98%	1.37%	2.82%	17.83%	5.77%	2.84%	4.78%

Frequently Asked Questions

Can I hold both PLFMX and PMDIX in my portfolio?

PLFMX and PMDIX have a correlation of 0.67, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PLFMX or PMDIX?

PLFMX has higher volatility (4.77%) compared to PMDIX (4.58%). In terms of maximum drawdown, PLFMX dropped -55.62% vs PMDIX's -46.47%.

Which has better risk-adjusted returns?

PLFMX currently has the higher Sharpe Ratio (2.10 vs 1.89), 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.