FOPC vs. MUSI

Last updated Jun 4, 2026

FOPC (Frontier Asset Opportunistic Credit ETF) and MUSI (American Century Multisector Income ETF) are both Multisector Bonds funds. Both are actively managed. Over the past year, FOPC returned 4.70% vs 5.99% for MUSI. Their correlation of 0.86 suggests significant overlap in exposure. FOPC charges 0.87%/yr vs 0.36%/yr for MUSI.

Performance

FOPC vs. MUSI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Frontier Asset Opportunistic Credit ETF (FOPC) and American Century Multisector Income ETF (MUSI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FOPC achieves a 0.46% return, which is significantly lower than MUSI's 0.59% return.

FOPC

• 1D: -0.18%
• 1M: 0.20%
• YTD: 0.46%
• 6M: 0.43%
• 1Y: 4.70%
• 3Y*: —
• 5Y*: —
• 10Y*: —

MUSI

• 1D: -0.20%
• 1M: 0.29%
• YTD: 0.59%
• 6M: 0.68%
• 1Y: 5.99%
• 3Y*: 6.30%
• 5Y*: —
• 10Y*: —

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

FOPC vs. MUSI - Yearly Performance Comparison

	2026 (YTD)	2025	2024
FOPC Frontier Asset Opportunistic Credit ETF	0.46%	6.54%	-0.00%
MUSI American Century Multisector Income ETF	0.59%	8.32%	-0.00%

Correlation

The correlation between FOPC and MUSI is 0.87, 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	0.87
Correlation (All Time) Calculated using the full available price history since Dec 23, 2024	0.86

The correlation between FOPC and MUSI has been stable across timeframes, ranging from 0.86 to 0.87 - a consistent structural relationship.

Return for Risk

FOPC vs. MUSI — Risk / Return Rank

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

FOPC

FOPC Risk / Return Rank: 47
FOPC Sharpe Ratio Rank: 48
FOPC Sortino Ratio Rank: 51
FOPC Omega Ratio Rank: 48
FOPC Calmar Ratio Rank: 45
FOPC Martin Ratio Rank: 45

MUSI

MUSI Risk / Return Rank: 51
MUSI Sharpe Ratio Rank: 53
MUSI Sortino Ratio Rank: 57
MUSI Omega Ratio Rank: 54
MUSI Calmar Ratio Rank: 44
MUSI Martin Ratio Rank: 47

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.

FOPC vs. MUSI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Frontier Asset Opportunistic Credit ETF (FOPC) and American Century Multisector Income ETF (MUSI). 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.

	FOPC	MUSI	Difference
Sharpe ratio: Return per unit of total volatility	1.65	1.80	-0.15
Sortino ratio: Return per unit of downside risk	2.45	2.71	-0.26
Omega ratio: Gain probability vs. loss probability	1.30	1.34	-0.04
Calmar ratio: Return relative to maximum drawdown	2.16	2.16	0.00
Martin ratio: Return relative to average drawdown	7.33	7.76	-0.43
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FOPC vs. MUSI - Sharpe Ratio Comparison

The current FOPC Sharpe Ratio is 1.65, which is comparable to the MUSI Sharpe Ratio of 1.80. The chart below compares the historical Sharpe Ratios of FOPC and MUSI, 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

	FOPC	MUSI	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.65	1.80	-0.15
Sharpe Ratio (All Time) Calculated using the full available price history	1.57	0.45	+1.12

Drawdowns

FOPC vs. MUSI - Drawdown Comparison

The maximum FOPC drawdown since its inception was -2.18%, smaller than the maximum MUSI drawdown of -13.91%. Use the drawdown chart below to compare losses from any high point for FOPC and MUSI.

Drawdown Indicators

	FOPC	MUSI	Difference
Max Drawdown Largest peak-to-trough decline	-2.18%	-13.91%	+11.73%
Max Drawdown (1Y) Largest decline over 1 year	-2.18%	-2.78%	+0.60%
Max Drawdown (3Y) Largest decline over 3 years	—	-4.16%	—
Current Drawdown Current decline from peak	-0.97%	-1.14%	+0.17%
Average Drawdown Average peak-to-trough decline	-0.41%	-4.22%	+3.81%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.64%	0.77%	-0.13%

Volatility

FOPC vs. MUSI - Volatility Comparison

The current volatility for Frontier Asset Opportunistic Credit ETF (FOPC) is 1.03%, while American Century Multisector Income ETF (MUSI) has a volatility of 1.24%. This indicates that FOPC experiences smaller price fluctuations and is considered to be less risky than MUSI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FOPC	MUSI	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.03%	1.24%	-0.21%
Volatility (6M) Calculated over the trailing 6-month period	2.19%	2.60%	-0.41%
Volatility (1Y) Calculated over the trailing 1-year period	2.86%	3.34%	-0.48%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.10%	4.85%	-1.75%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.10%	4.85%	-1.75%

FOPC vs. MUSI - Expense Ratio Comparison

FOPC has a 0.87% expense ratio, which is higher than MUSI's 0.36% expense ratio.

Dividends

FOPC vs. MUSI - Dividend Comparison

FOPC's dividend yield for the trailing twelve months is around 4.27%, less than MUSI's 5.15% yield.

Position	TTM	2025	2024	2023	2022	2021
FOPC Frontier Asset Opportunistic Credit ETF	4.27%	4.42%	0.06%	0.00%	0.00%	0.00%
MUSI American Century Multisector Income ETF	5.15%	5.74%	6.00%	5.20%	4.02%	1.62%

Frequently Asked Questions

Can I hold both FOPC and MUSI in my portfolio?

FOPC and MUSI have a correlation of 0.87, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FOPC or MUSI?

MUSI has higher volatility (1.24%) compared to FOPC (1.03%). In terms of maximum drawdown, FOPC dropped -2.18% vs MUSI's -13.91%.

Which ETF is better, FOPC or MUSI?

On 1-year performance, MUSI leads with 5.99% vs 4.70% for FOPC. On fees, MUSI is cheaper at 0.36% per year. On volatility, FOPC has been the lower-risk option at 1.03%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, FOPC or MUSI?

Over the 1-year period, MUSI has performed better with a 5.99% return vs 4.70%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, FOPC or MUSI?

MUSI is cheaper with a 0.36% expense ratio, compared with 0.87% for FOPC.

Which ETF pays a higher dividend yield, FOPC or MUSI?

MUSI has the higher dividend yield at 5.15%, compared with 4.27% for FOPC.

What is the main difference between FOPC and MUSI?

They also come from different issuers: Frontier and American Century. Their fees differ too: 0.87% for FOPC and 0.36% for MUSI.

Which has better risk-adjusted returns?

MUSI currently has the higher Sharpe Ratio (1.80 vs 1.65), 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.