PIDIX vs. CMNWX

Last updated Jun 24, 2026

PIDIX (Principal International Equity Index Fund) and CMNWX (Principal Capital Appreciation Fund) are both mutual funds - PIDIX is a Foreign Large Cap Equities fund managed by Principal, while CMNWX is a Large Cap Blend Equities fund managed by Principal. Over the past 10 years, PIDIX returned 10.03%/yr vs 15.72%/yr for CMNWX. A 0.78 correlation means they provide meaningful diversification when combined. PIDIX charges 0.32%/yr vs 0.80%/yr for CMNWX.

Performance

PIDIX vs. CMNWX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Principal International Equity Index Fund (PIDIX) and Principal Capital Appreciation Fund (CMNWX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PIDIX achieves a 10.72% return, which is significantly higher than CMNWX's 8.97% return. Over the past 10 years, PIDIX has underperformed CMNWX with an annualized return of 10.03%, while CMNWX has yielded a comparatively higher 15.72% annualized return.

PIDIX

• 1D: 0.13%
• 1M: 2.12%
• YTD: 10.72%
• 6M: 10.19%
• 1Y: 24.17%
• 3Y*: 17.74%
• 5Y*: 9.29%
• 10Y*: 10.03%

CMNWX

• 1D: -0.31%
• 1M: 0.62%
• YTD: 8.97%
• 6M: 7.80%
• 1Y: 22.38%
• 3Y*: 22.15%
• 5Y*: 14.07%
• 10Y*: 15.72%

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

PIDIX vs. CMNWX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PIDIX Principal International Equity Index Fund	10.72%	31.07%	4.72%	17.87%	-14.43%	11.07%	7.78%	21.42%	-13.57%	24.87%
CMNWX Principal Capital Appreciation Fund	8.97%	13.27%	32.14%	25.01%	-16.37%	27.45%	18.36%	32.21%	-4.12%	20.64%

Correlation

The correlation between PIDIX and CMNWX is 0.75, 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	0.75
Correlation (3Y) Calculated over the trailing 3-year period	0.71
Correlation (5Y) Calculated over the trailing 5-year period	0.75
Correlation (10Y) Calculated over the trailing 10-year period	0.76
Correlation (All Time) Calculated using the full available price history since Jan 4, 2010	0.78

The correlation between PIDIX and CMNWX has been stable across timeframes, ranging from 0.71 to 0.78 - a consistent structural relationship.

Return for Risk

PIDIX vs. CMNWX — Risk / Return Rank

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

PIDIX

PIDIX Risk / Return Rank: 37
PIDIX Sharpe Ratio Rank: 37
PIDIX Sortino Ratio Rank: 36
PIDIX Omega Ratio Rank: 36
PIDIX Calmar Ratio Rank: 39
PIDIX Martin Ratio Rank: 40

CMNWX

CMNWX Risk / Return Rank: 49
CMNWX Sharpe Ratio Rank: 45
CMNWX Sortino Ratio Rank: 42
CMNWX Omega Ratio Rank: 42
CMNWX Calmar Ratio Rank: 53
CMNWX Martin Ratio Rank: 66

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.

PIDIX vs. CMNWX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Principal International Equity Index Fund (PIDIX) and Principal Capital Appreciation Fund (CMNWX). 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.

	PIDIX	CMNWX	Difference
Sharpe ratio: Return per unit of total volatility	1.63	1.83	-0.20
Sortino ratio: Return per unit of downside risk	2.31	2.49	-0.18
Omega ratio: Gain probability vs. loss probability	1.29	1.32	-0.03
Calmar ratio: Return relative to maximum drawdown	2.23	2.66	-0.43
Martin ratio: Return relative to average drawdown	8.33	12.02	-3.69

PIDIX vs. CMNWX - Sharpe Ratio Comparison

The current PIDIX Sharpe Ratio is 1.63, which is comparable to the CMNWX Sharpe Ratio of 1.83. The chart below compares the historical Sharpe Ratios of PIDIX and CMNWX, 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

PIDIX vs. CMNWX - Drawdown Comparison

The maximum PIDIX drawdown since its inception was -34.13%, smaller than the maximum CMNWX drawdown of -50.43%. Use the drawdown chart below to compare losses from any high point for PIDIX and CMNWX.

Drawdown Indicators

	PIDIX	CMNWX	Difference
Max Drawdown Largest peak-to-trough decline	-34.13%	-50.43%	+16.30%
Max Drawdown (1Y) Largest decline over 1 year	-11.31%	-8.91%	-2.40%
Max Drawdown (3Y) Largest decline over 3 years	-13.59%	-19.54%	+5.95%
Max Drawdown (5Y) Largest decline over 5 years	-29.50%	-23.35%	-6.15%
Max Drawdown (10Y) Largest decline over 10 years	-34.13%	-33.26%	-0.87%
Current Drawdown Current decline from peak	0.00%	-1.65%	+1.65%
Average Drawdown Average peak-to-trough decline	-7.47%	-6.94%	-0.53%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.03%	1.97%	+1.06%

Volatility

PIDIX vs. CMNWX - Volatility Comparison

Principal International Equity Index Fund (PIDIX) and Principal Capital Appreciation Fund (CMNWX) have volatilities of 4.81% and 4.82%, 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

	PIDIX	CMNWX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.81%	4.82%	-0.01%
Volatility (6M) Calculated over the trailing 6-month period	12.91%	10.18%	+2.73%
Volatility (1Y) Calculated over the trailing 1-year period	15.56%	13.02%	+2.54%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.26%	16.90%	-0.64%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.30%	17.24%	-0.94%

PIDIX vs. CMNWX - Expense Ratio Comparison

PIDIX has a 0.32% expense ratio, which is lower than CMNWX's 0.80% expense ratio.

Dividends

PIDIX vs. CMNWX - Dividend Comparison

PIDIX's dividend yield for the trailing twelve months is around 3.10%, less than CMNWX's 8.03% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CMNWX Principal Capital Appreciation Fund	8.03%	8.75%	10.03%	0.71%	0.69%	9.52%	5.33%	8.37%	46.60%	7.72%	10.32%	5.42%
PIDIX Principal International Equity Index Fund	3.10%	3.43%	5.85%	3.81%	2.82%	5.14%	2.34%	3.36%	3.91%	3.48%	2.82%	3.67%

Frequently Asked Questions

Can I hold both PIDIX and CMNWX in my portfolio?

PIDIX and CMNWX have a correlation of 0.75, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PIDIX or CMNWX?

CMNWX has higher volatility (4.82%) compared to PIDIX (4.81%). In terms of maximum drawdown, PIDIX dropped -34.13% vs CMNWX's -50.43%.

Which has better risk-adjusted returns?

CMNWX currently has the higher Sharpe Ratio (1.83 vs 1.63), 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.