PIDIX vs. FHLFX

Last updated Jun 4, 2026

PIDIX (Principal International Equity Index Fund) and FHLFX (Fidelity Series International Index Fund) are both Foreign Large Cap Equities funds. Over the past 5 years, PIDIX returned 8.80%/yr vs 8.85%/yr for FHLFX. With a 0.98 correlation, they move nearly in lockstep. PIDIX charges 0.32%/yr vs 0.01%/yr for FHLFX.

Performance

PIDIX vs. FHLFX - Performance Comparison

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

Returns By Period

The year-to-date returns for both investments are quite close, with PIDIX having a 9.50% return and FHLFX slightly higher at 9.53%.

PIDIX

• 1D: 0.33%
• 1M: 4.10%
• YTD: 9.50%
• 6M: 11.89%
• 1Y: 21.95%
• 3Y*: 17.24%
• 5Y*: 8.80%
• 10Y*: 9.18%

FHLFX

• 1D: 0.42%
• 1M: 4.09%
• YTD: 9.53%
• 6M: 12.09%
• 1Y: 22.51%
• 3Y*: 17.18%
• 5Y*: 8.85%
• 10Y*: —

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

PIDIX vs. FHLFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
PIDIX Principal International Equity Index Fund	9.50%	31.07%	4.72%	17.87%	-14.43%	11.07%	7.78%	21.42%	-10.76%
FHLFX Fidelity Series International Index Fund	9.53%	31.96%	3.67%	18.16%	-14.17%	11.23%	8.09%	21.66%	-10.70%

Correlation

The correlation between PIDIX and FHLFX is 0.99 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.99
Correlation (3Y) Calculated over the trailing 3-year period	0.98
Correlation (5Y) Calculated over the trailing 5-year period	0.98
Correlation (All Time) Calculated using the full available price history since Sep 5, 2018	0.98

The correlation between PIDIX and FHLFX has been stable across timeframes, ranging from 0.98 to 0.99 - a consistent structural relationship.

Return for Risk

PIDIX vs. FHLFX — Risk / Return Rank

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

PIDIX

PIDIX Risk / Return Rank: 25
PIDIX Sharpe Ratio Rank: 24
PIDIX Sortino Ratio Rank: 23
PIDIX Omega Ratio Rank: 23
PIDIX Calmar Ratio Rank: 25
PIDIX Martin Ratio Rank: 30

FHLFX

FHLFX Risk / Return Rank: 27
FHLFX Sharpe Ratio Rank: 26
FHLFX Sortino Ratio Rank: 26
FHLFX Omega Ratio Rank: 26
FHLFX Calmar Ratio Rank: 26
FHLFX Martin Ratio Rank: 31

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. FHLFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Principal International Equity Index Fund (PIDIX) and Fidelity Series International Index Fund (FHLFX). 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.

	PIDIX	FHLFX	Difference
Sharpe ratio: Return per unit of total volatility	1.40	1.47	-0.07
Sortino ratio: Return per unit of downside risk	2.01	2.10	-0.09
Omega ratio: Gain probability vs. loss probability	1.25	1.27	-0.01
Calmar ratio: Return relative to maximum drawdown	1.86	1.91	-0.05
Martin ratio: Return relative to average drawdown	6.97	7.17	-0.19
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PIDIX vs. FHLFX - Sharpe Ratio Comparison

The current PIDIX Sharpe Ratio is 1.40, which is comparable to the FHLFX Sharpe Ratio of 1.47. The chart below compares the historical Sharpe Ratios of PIDIX and FHLFX, 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

	PIDIX	FHLFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.40	1.47	-0.07
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.55	0.56	-0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.56	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.39	0.53	-0.13

Drawdowns

PIDIX vs. FHLFX - Drawdown Comparison

The maximum PIDIX drawdown since its inception was -34.13%, roughly equal to the maximum FHLFX drawdown of -33.58%. Use the drawdown chart below to compare losses from any high point for PIDIX and FHLFX.

Drawdown Indicators

	PIDIX	FHLFX	Difference
Max Drawdown Largest peak-to-trough decline	-34.13%	-33.58%	-0.55%
Max Drawdown (1Y) Largest decline over 1 year	-11.31%	-11.37%	+0.06%
Max Drawdown (3Y) Largest decline over 3 years	-13.59%	-13.62%	+0.03%
Max Drawdown (5Y) Largest decline over 5 years	-29.50%	-29.36%	-0.14%
Max Drawdown (10Y) Largest decline over 10 years	-34.13%	—	—
Current Drawdown Current decline from peak	-0.46%	-0.42%	-0.04%
Average Drawdown Average peak-to-trough decline	-7.49%	-6.11%	-1.38%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.02%	3.03%	-0.01%

Volatility

PIDIX vs. FHLFX - Volatility Comparison

Principal International Equity Index Fund (PIDIX) and Fidelity Series International Index Fund (FHLFX) have volatilities of 4.71% and 4.64%, 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	FHLFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.71%	4.64%	+0.07%
Volatility (6M) Calculated over the trailing 6-month period	12.29%	12.08%	+0.21%
Volatility (1Y) Calculated over the trailing 1-year period	15.12%	14.83%	+0.29%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.18%	15.98%	+0.20%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.33%	17.64%	-1.31%

PIDIX vs. FHLFX - Expense Ratio Comparison

PIDIX has a 0.32% expense ratio, which is higher than FHLFX's 0.01% expense ratio.

Dividends

PIDIX vs. FHLFX - Dividend Comparison

PIDIX's dividend yield for the trailing twelve months is around 3.13%, which matches FHLFX's 3.16% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FHLFX Fidelity Series International Index Fund	3.16%	3.46%	2.98%	2.86%	2.60%	2.47%	1.92%	1.95%	0.62%	0.00%	0.00%	0.00%
PIDIX Principal International Equity Index Fund	3.13%	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 FHLFX in my portfolio?

With a correlation of 0.99, PIDIX and FHLFX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, PIDIX or FHLFX?

PIDIX has higher volatility (4.71%) compared to FHLFX (4.64%). In terms of maximum drawdown, PIDIX dropped -34.13% vs FHLFX's -33.58%.

Which has better risk-adjusted returns?

FHLFX currently has the higher Sharpe Ratio (1.47 vs 1.40), 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.