PNIIX vs. PLSAX

Last updated Aug 1, 2026

PNIIX (Principal Bond Market Index Fund) and PLSAX (Principal LargeCap S&P 500 Index Fund Class A) are both mutual funds - PNIIX is a Intermediate Core Bond fund managed by Principal, while PLSAX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, PNIIX returned 1.21%/yr vs 14.68%/yr for PLSAX. Their -0.13 correlation means they have often moved in opposite directions in the past. PNIIX charges 0.15%/yr vs 0.38%/yr for PLSAX.

Performance

PNIIX vs. PLSAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Principal Bond Market Index Fund (PNIIX) and Principal LargeCap S&P 500 Index Fund Class A (PLSAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PNIIX achieves a -0.35% return, which is significantly lower than PLSAX's 9.18% return. Over the past 10 years, PNIIX has underperformed PLSAX with an annualized return of 1.21%, while PLSAX has yielded a comparatively higher 14.68% annualized return.

PNIIX

• 1D: 0.00%
• 1M: -0.93%
• 6M: -0.58%
• YTD: -0.35%
• 1Y: 1.96%
• 3Y*: 3.65%
• 5Y*: -0.49%
• 10Y*: 1.21%
• ALL TIME*: 2.34%

PLSAX

• 1D: 1.64%
• 1M: -0.59%
• 6M: 7.65%
• YTD: 9.18%
• 1Y: 20.30%
• 3Y*: 19.22%
• 5Y*: 12.59%
• 10Y*: 14.68%
• ALL TIME*: 8.01%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
PLSAX Principal LargeCap S&P 500 Index Fund Class A	$0.00	$0.00	$0.00
PNIIX Principal Bond Market Index Fund	$0.00	$0.00	$0.00

PNIIX vs. PLSAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PNIIX Principal Bond Market Index Fund	-0.35%	7.01%	1.17%	5.55%	-13.26%	-1.68%	7.28%	8.47%	-0.20%	3.31%
PLSAX Principal LargeCap S&P 500 Index Fund Class A	9.18%	17.50%	26.46%	25.70%	-18.41%	27.93%	17.85%	30.97%	-4.93%	21.23%

Correlation

The correlation between PNIIX and PLSAX is 0.33, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.33
Correlation (3Y) Balances recent behavior with more history.	0.21
Correlation (5Y) Shows whether the relationship held over a longer period.	0.16
Correlation (10Y) Provides a long-term view across more market conditions.	0.01
Correlation (All Time) Calculated using the full available price history since Dec 31, 2009	-0.13

The correlation between PNIIX and PLSAX shifts across timeframes, from -0.13 (all time) to 0.33 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

PNIIX vs. PLSAX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

PNIIX

PNIIX Risk / Return Rank: 19
PNIIX Sharpe Ratio Rank: 19
PNIIX Sortino Ratio Rank: 19
PNIIX Omega Ratio Rank: 18
PNIIX Calmar Ratio Rank: 21
PNIIX Martin Ratio Rank: 18

PLSAX

PLSAX Risk / Return Rank: 60
PLSAX Sharpe Ratio Rank: 57
PLSAX Sortino Ratio Rank: 54
PLSAX Omega Ratio Rank: 54
PLSAX Calmar Ratio Rank: 60
PLSAX Martin Ratio Rank: 72

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

PNIIX vs. PLSAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Principal Bond Market Index Fund (PNIIX) and Principal LargeCap S&P 500 Index Fund Class A (PLSAX). 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.

	PNIIX	PLSAX	Difference
Sharpe ratio: Return per unit of total volatility	0.77	1.40	-0.64
Sortino ratio: Return per unit of downside risk	1.14	1.97	-0.83
Omega ratio: Gain probability vs. loss probability	1.13	1.25	-0.12
Calmar ratio: Return relative to maximum drawdown	1.06	2.02	-0.96
Martin ratio: Return relative to average drawdown	2.67	8.64	-5.98

PNIIX vs. PLSAX - Sharpe Ratio Comparison

The current PNIIX Sharpe Ratio is 0.77, which is lower than the PLSAX Sharpe Ratio of 1.40. The chart below compares the historical Sharpe Ratios of PNIIX and PLSAX, 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

PNIIX vs. PLSAX - Drawdown Comparison

The maximum PNIIX drawdown since its inception was -18.76%, smaller than the maximum PLSAX drawdown of -55.67%. Use the drawdown chart below to compare losses from any high point for PNIIX and PLSAX.

Drawdown Indicators

	PNIIX	PLSAX	Difference
Max Drawdown Largest peak-to-trough decline	-18.76%	-55.67%	+36.91%
Max Drawdown (1Y) Largest decline over 1 year	-2.76%	-8.94%	+6.18%
Max Drawdown (3Y) Largest decline over 3 years	-5.04%	-18.78%	+13.74%
Max Drawdown (5Y) Largest decline over 5 years	-18.14%	-24.69%	+6.55%
Max Drawdown (10Y) Largest decline over 10 years	-18.76%	-33.79%	+15.03%
Current Drawdown Current decline from peak	-3.44%	-2.16%	-1.28%
Average Drawdown Average peak-to-trough decline	-3.44%	-10.10%	+6.66%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.10%	2.08%	-0.98%

Volatility

PNIIX vs. PLSAX - Volatility Comparison

The current volatility for Principal Bond Market Index Fund (PNIIX) is 1.00%, while Principal LargeCap S&P 500 Index Fund Class A (PLSAX) has a volatility of 3.42%. This indicates that PNIIX experiences smaller price fluctuations and is considered to be less risky than PLSAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PNIIX	PLSAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.00%	3.42%	-2.42%
Volatility (6M) Calculated over the trailing 6-month period	2.95%	10.07%	-7.12%
Volatility (1Y) Calculated over the trailing 1-year period	3.82%	12.84%	-9.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.32%	17.03%	-10.71%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.09%	17.50%	-12.41%

PNIIX vs. PLSAX - Expense Ratio Comparison

PNIIX has a 0.15% expense ratio, which is lower than PLSAX's 0.38% expense ratio.

Dividends

PNIIX vs. PLSAX - Dividend Comparison

PNIIX's dividend yield for the trailing twelve months is around 4.03%, more than PLSAX's 2.52% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PLSAX Principal LargeCap S&P 500 Index Fund Class A	2.52%	2.75%	4.07%	3.90%	2.70%	13.38%	7.35%	3.57%	7.19%	6.72%	2.93%	2.36%
PNIIX Principal Bond Market Index Fund	4.03%	4.01%	3.60%	4.18%	1.66%	2.03%	18.60%	2.40%	2.51%	2.35%	1.78%	2.10%

Frequently Asked Questions

Can I hold both PNIIX and PLSAX in my portfolio?

PNIIX and PLSAX have a correlation of 0.33, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PNIIX or PLSAX?

PLSAX has higher volatility (3.42%) compared to PNIIX (1.00%). In terms of maximum drawdown, PNIIX dropped -18.76% vs PLSAX's -55.67%.

Which has better risk-adjusted returns?

PLSAX currently has the higher Sharpe Ratio (1.40 vs 0.77), 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.