BCHYX vs. OPCAX

Last updated Jun 24, 2026

BCHYX (American Century California High Yield Municipal Fund) and OPCAX (Invesco California Municipal Fund) are both Municipal Bonds funds. Over the past 10 years, BCHYX returned 2.32%/yr vs 2.86%/yr for OPCAX. A 0.75 correlation means they provide meaningful diversification when combined. BCHYX charges 0.49%/yr vs 0.75%/yr for OPCAX.

Performance

BCHYX vs. OPCAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century California High Yield Municipal Fund (BCHYX) and Invesco California Municipal Fund (OPCAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BCHYX achieves a 2.21% return, which is significantly higher than OPCAX's 1.83% return. Over the past 10 years, BCHYX has underperformed OPCAX with an annualized return of 2.32%, while OPCAX has yielded a comparatively higher 2.86% annualized return.

BCHYX

• 1D: -0.10%
• 1M: 1.91%
• YTD: 2.21%
• 6M: 2.77%
• 1Y: 7.77%
• 3Y*: 4.65%
• 5Y*: 0.73%
• 10Y*: 2.32%

OPCAX

• 1D: -0.13%
• 1M: 2.28%
• YTD: 1.83%
• 6M: 2.32%
• 1Y: 6.77%
• 3Y*: 3.57%
• 5Y*: 0.43%
• 10Y*: 2.86%

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

BCHYX vs. OPCAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BCHYX American Century California High Yield Municipal Fund	2.21%	3.48%	4.07%	6.69%	-12.77%	3.82%	3.95%	9.92%	0.65%	8.50%
OPCAX Invesco California Municipal Fund	1.83%	2.59%	2.86%	6.86%	-12.10%	3.56%	6.07%	10.31%	6.59%	4.47%

Correlation

The correlation between BCHYX and OPCAX is 0.84, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.84
Correlation (3Y) Calculated over the trailing 3-year period	0.91
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.81
Correlation (All Time) Calculated using the full available price history since Jun 20, 1996	0.75

The correlation between BCHYX and OPCAX shifts across timeframes, from 0.75 (all time) to 0.92 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

BCHYX vs. OPCAX — Risk / Return Rank

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

BCHYX

BCHYX Risk / Return Rank: 71
BCHYX Sharpe Ratio Rank: 80
BCHYX Sortino Ratio Rank: 88
BCHYX Omega Ratio Rank: 88
BCHYX Calmar Ratio Rank: 53
BCHYX Martin Ratio Rank: 47

OPCAX

OPCAX Risk / Return Rank: 54
OPCAX Sharpe Ratio Rank: 53
OPCAX Sortino Ratio Rank: 63
OPCAX Omega Ratio Rank: 75
OPCAX Calmar Ratio Rank: 42
OPCAX Martin Ratio Rank: 37

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.

BCHYX vs. OPCAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century California High Yield Municipal Fund (BCHYX) and Invesco California Municipal Fund (OPCAX). 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.

	BCHYX	OPCAX	Difference
Sharpe ratio: Return per unit of total volatility	2.41	1.98	+0.43
Sortino ratio: Return per unit of downside risk	3.95	3.03	+0.92
Omega ratio: Gain probability vs. loss probability	1.58	1.45	+0.14
Calmar ratio: Return relative to maximum drawdown	2.67	2.36	+0.31
Martin ratio: Return relative to average drawdown	9.25	7.65	+1.60

BCHYX vs. OPCAX - Sharpe Ratio Comparison

The current BCHYX Sharpe Ratio is 2.41, which is comparable to the OPCAX Sharpe Ratio of 1.98. The chart below compares the historical Sharpe Ratios of BCHYX and OPCAX, 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

BCHYX vs. OPCAX - Drawdown Comparison

The maximum BCHYX drawdown since its inception was -18.35%, smaller than the maximum OPCAX drawdown of -47.36%. Use the drawdown chart below to compare losses from any high point for BCHYX and OPCAX.

Drawdown Indicators

	BCHYX	OPCAX	Difference
Max Drawdown Largest peak-to-trough decline	-18.35%	-47.36%	+29.01%
Max Drawdown (1Y) Largest decline over 1 year	-2.97%	-3.25%	+0.28%
Max Drawdown (3Y) Largest decline over 3 years	-7.69%	-8.46%	+0.77%
Max Drawdown (5Y) Largest decline over 5 years	-18.35%	-18.53%	+0.18%
Max Drawdown (10Y) Largest decline over 10 years	-18.35%	-18.53%	+0.18%
Current Drawdown Current decline from peak	-0.10%	-0.13%	+0.03%
Average Drawdown Average peak-to-trough decline	-2.38%	-4.30%	+1.92%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.85%	1.04%	-0.19%

Volatility

BCHYX vs. OPCAX - Volatility Comparison

The current volatility for American Century California High Yield Municipal Fund (BCHYX) is 0.84%, while Invesco California Municipal Fund (OPCAX) has a volatility of 1.02%. This indicates that BCHYX experiences smaller price fluctuations and is considered to be less risky than OPCAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BCHYX	OPCAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.84%	1.02%	-0.18%
Volatility (6M) Calculated over the trailing 6-month period	2.35%	2.73%	-0.38%
Volatility (1Y) Calculated over the trailing 1-year period	3.29%	3.89%	-0.60%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.88%	5.46%	-0.58%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.81%	5.12%	-0.31%

BCHYX vs. OPCAX - Expense Ratio Comparison

BCHYX has a 0.49% expense ratio, which is lower than OPCAX's 0.75% expense ratio.

Dividends

BCHYX vs. OPCAX - Dividend Comparison

BCHYX's dividend yield for the trailing twelve months is around 3.95%, more than OPCAX's 2.76% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BCHYX American Century California High Yield Municipal Fund	3.95%	4.58%	4.41%	3.67%	2.55%	2.57%	3.07%	3.50%	3.52%	3.50%	3.59%	3.67%
OPCAX Invesco California Municipal Fund	2.76%	4.76%	4.19%	3.06%	2.86%	3.05%	3.15%	3.64%	3.71%	4.59%	4.92%	5.48%

Frequently Asked Questions

Can I hold both BCHYX and OPCAX in my portfolio?

BCHYX and OPCAX have a correlation of 0.84, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BCHYX or OPCAX?

OPCAX has higher volatility (1.02%) compared to BCHYX (0.84%). In terms of maximum drawdown, BCHYX dropped -18.35% vs OPCAX's -47.36%.

Which has better risk-adjusted returns?

BCHYX currently has the higher Sharpe Ratio (2.41 vs 1.98), 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.