PTEAX vs. CMPIX

Last updated Jun 4, 2026

PTEAX (Principal Tax-Exempt Bond Fund) and CMPIX (Principal Core Fixed Income) are both mutual funds - PTEAX is a Municipal Bonds fund managed by Principal, while CMPIX is a Intermediate Core Bond fund managed by Principal. Over the past 10 years, PTEAX returned 2.01%/yr vs 1.68%/yr for CMPIX. A 0.55 correlation means they provide meaningful diversification when combined. PTEAX charges 0.73%/yr vs 0.74%/yr for CMPIX.

Performance

PTEAX vs. CMPIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Principal Tax-Exempt Bond Fund (PTEAX) and Principal Core Fixed Income (CMPIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PTEAX achieves a 1.38% return, which is significantly higher than CMPIX's 0.26% return. Over the past 10 years, PTEAX has outperformed CMPIX with an annualized return of 2.01%, while CMPIX has yielded a comparatively lower 1.68% annualized return.

PTEAX

• 1D: 0.15%
• 1M: 0.77%
• YTD: 1.38%
• 6M: 1.71%
• 1Y: 6.98%
• 3Y*: 3.94%
• 5Y*: 0.36%
• 10Y*: 2.01%

CMPIX

• 1D: 0.00%
• 1M: 0.53%
• YTD: 0.26%
• 6M: 0.10%
• 1Y: 5.06%
• 3Y*: 3.68%
• 5Y*: -0.19%
• 10Y*: 1.68%

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

PTEAX vs. CMPIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PTEAX Principal Tax-Exempt Bond Fund	1.38%	4.68%	2.10%	6.35%	-12.18%	2.71%	4.80%	9.05%	0.44%	6.44%
CMPIX Principal Core Fixed Income	0.26%	6.76%	1.26%	4.89%	-13.34%	-2.03%	7.84%	8.59%	-0.24%	4.16%

Correlation

The correlation between PTEAX and CMPIX is 0.52, 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	0.52
Correlation (3Y) Calculated over the trailing 3-year period	0.59
Correlation (5Y) Calculated over the trailing 5-year period	0.53
Correlation (10Y) Calculated over the trailing 10-year period	0.51
Correlation (All Time) Calculated using the full available price history since Jun 21, 1996	0.55

The correlation between PTEAX and CMPIX has been stable across timeframes, ranging from 0.51 to 0.59 - a consistent structural relationship.

Return for Risk

PTEAX vs. CMPIX — Risk / Return Rank

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

PTEAX

PTEAX Risk / Return Rank: 59
PTEAX Sharpe Ratio Rank: 63
PTEAX Sortino Ratio Rank: 80
PTEAX Omega Ratio Rank: 87
PTEAX Calmar Ratio Rank: 34
PTEAX Martin Ratio Rank: 33

CMPIX

CMPIX Risk / Return Rank: 20
CMPIX Sharpe Ratio Rank: 20
CMPIX Sortino Ratio Rank: 20
CMPIX Omega Ratio Rank: 20
CMPIX Calmar Ratio Rank: 21
CMPIX Martin Ratio Rank: 19

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.

PTEAX vs. CMPIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Principal Tax-Exempt Bond Fund (PTEAX) and Principal Core Fixed Income (CMPIX). 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.

	PTEAX	CMPIX	Difference
Sharpe ratio: Return per unit of total volatility	2.33	1.29	+1.04
Sortino ratio: Return per unit of downside risk	3.79	1.89	+1.90
Omega ratio: Gain probability vs. loss probability	1.60	1.23	+0.37
Calmar ratio: Return relative to maximum drawdown	2.21	1.71	+0.49
Martin ratio: Return relative to average drawdown	7.44	5.17	+2.27
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PTEAX vs. CMPIX - Sharpe Ratio Comparison

The current PTEAX Sharpe Ratio is 2.33, which is higher than the CMPIX Sharpe Ratio of 1.29. The chart below compares the historical Sharpe Ratios of PTEAX and CMPIX, 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

	PTEAX	CMPIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.33	1.29	+1.04
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.09	-0.03	+0.12
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.46	0.35	+0.11
Sharpe Ratio (All Time) Calculated using the full available price history	0.32	0.98	-0.67

Drawdowns

PTEAX vs. CMPIX - Drawdown Comparison

The maximum PTEAX drawdown since its inception was -38.72%, which is greater than CMPIX's maximum drawdown of -18.80%. Use the drawdown chart below to compare losses from any high point for PTEAX and CMPIX.

Drawdown Indicators

	PTEAX	CMPIX	Difference
Max Drawdown Largest peak-to-trough decline	-38.72%	-18.80%	-19.92%
Max Drawdown (1Y) Largest decline over 1 year	-3.10%	-2.97%	-0.13%
Max Drawdown (3Y) Largest decline over 3 years	-5.31%	-6.58%	+1.27%
Max Drawdown (5Y) Largest decline over 5 years	-17.37%	-18.51%	+1.14%
Max Drawdown (10Y) Largest decline over 10 years	-17.37%	-18.80%	+1.43%
Current Drawdown Current decline from peak	-0.55%	-3.49%	+2.94%
Average Drawdown Average peak-to-trough decline	-5.93%	-2.48%	-3.45%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.92%	0.98%	-0.06%

Volatility

PTEAX vs. CMPIX - Volatility Comparison

The current volatility for Principal Tax-Exempt Bond Fund (PTEAX) is 1.03%, while Principal Core Fixed Income (CMPIX) has a volatility of 1.42%. This indicates that PTEAX experiences smaller price fluctuations and is considered to be less risky than CMPIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PTEAX	CMPIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.03%	1.42%	-0.39%
Volatility (6M) Calculated over the trailing 6-month period	2.10%	2.93%	-0.83%
Volatility (1Y) Calculated over the trailing 1-year period	2.95%	3.96%	-1.01%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.00%	5.81%	-1.81%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.40%	4.82%	-0.42%

PTEAX vs. CMPIX - Expense Ratio Comparison

PTEAX has a 0.73% expense ratio, which is lower than CMPIX's 0.74% expense ratio.

Dividends

PTEAX vs. CMPIX - Dividend Comparison

PTEAX's dividend yield for the trailing twelve months is around 3.82%, more than CMPIX's 3.43% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CMPIX Principal Core Fixed Income	3.43%	3.35%	3.27%	2.37%	2.10%	1.94%	2.11%	2.71%	3.19%	2.91%	3.17%	3.29%
PTEAX Principal Tax-Exempt Bond Fund	3.82%	4.66%	3.73%	2.81%	2.27%	2.15%	2.23%	3.09%	3.68%	3.69%	3.91%	3.75%

Frequently Asked Questions

Can I hold both PTEAX and CMPIX in my portfolio?

PTEAX and CMPIX have a correlation of 0.52, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PTEAX or CMPIX?

CMPIX has higher volatility (1.42%) compared to PTEAX (1.03%). In terms of maximum drawdown, PTEAX dropped -38.72% vs CMPIX's -18.80%.

Which has better risk-adjusted returns?

PTEAX currently has the higher Sharpe Ratio (2.33 vs 1.29), 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.