MUSI vs. SIFI

Last updated Jun 3, 2026

MUSI (American Century Multisector Income ETF) and SIFI (Harbor Scientific Alpha Income ETF) are both Multisector Bonds funds. Both are actively managed. Over the past 3 years, MUSI returned 6.37%/yr vs 7.19%/yr for SIFI. Their correlation of 0.81 suggests significant overlap in exposure. MUSI charges 0.36%/yr vs 0.50%/yr for SIFI.

Performance

MUSI vs. SIFI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Multisector Income ETF (MUSI) and Harbor Scientific Alpha Income ETF (SIFI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, MUSI achieves a 0.80% return, which is significantly lower than SIFI's 1.27% return.

MUSI

• 1D: 0.09%
• 1M: 0.13%
• YTD: 0.80%
• 6M: 1.02%
• 1Y: 6.20%
• 3Y*: 6.37%
• 5Y*: —
• 10Y*: —

SIFI

• 1D: 0.01%
• 1M: 0.30%
• YTD: 1.27%
• 6M: 1.70%
• 1Y: 7.56%
• 3Y*: 7.19%
• 5Y*: —
• 10Y*: —

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

MUSI vs. SIFI - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
MUSI American Century Multisector Income ETF	0.80%	8.32%	5.14%	7.51%	-10.33%	-0.47%
SIFI Harbor Scientific Alpha Income ETF	1.27%	8.83%	5.05%	8.75%	-10.58%	-1.05%

Correlation

The correlation between MUSI and SIFI is 0.81, 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	0.81
Correlation (3Y) Calculated over the trailing 3-year period	0.81
Correlation (All Time) Calculated using the full available price history since Sep 17, 2021	0.81

The correlation between MUSI and SIFI has been stable across timeframes, ranging from 0.81 to 0.81 - a consistent structural relationship.

MUSI vs. SIFI - Sectors Allocation Comparison

Sectors	MUSI	SIFI
Utilities	77.9%	1.9%
Healthcare	22.1%	3.9%
Basic Materials	-	0.7%
Communication Services	-	3.0%
Consumer Cyclical	-	11.8%
Consumer Defensive	-	2.9%
Energy	-	7.9%
Financial Services	-	4.4%
Industrials	-	16.2%
Real Estate	-	4.8%
Technology	-	15.7%

Return for Risk

MUSI vs. SIFI — Risk / Return Rank

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

MUSI

MUSI Risk / Return Rank: 52
MUSI Sharpe Ratio Rank: 54
MUSI Sortino Ratio Rank: 59
MUSI Omega Ratio Rank: 56
MUSI Calmar Ratio Rank: 44
MUSI Martin Ratio Rank: 47

SIFI

SIFI Risk / Return Rank: 66
SIFI Sharpe Ratio Rank: 67
SIFI Sortino Ratio Rank: 75
SIFI Omega Ratio Rank: 71
SIFI Calmar Ratio Rank: 54
SIFI Martin Ratio Rank: 61

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.

MUSI vs. SIFI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Multisector Income ETF (MUSI) and Harbor Scientific Alpha Income ETF (SIFI). 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.

	MUSI	SIFI	Difference
Sharpe ratio Return per unit of total volatility	1.87	2.24	-0.38
Sortino ratio Return per unit of downside risk	2.81	3.43	-0.61
Omega ratio Gain probability vs. loss probability	1.35	1.43	-0.08
Calmar ratio Return relative to maximum drawdown	2.19	2.74	-0.55
Martin ratio Return relative to average drawdown	7.91	11.23	-3.33
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

MUSI vs. SIFI - Sharpe Ratio Comparison

The current MUSI Sharpe Ratio is 1.87, which is comparable to the SIFI Sharpe Ratio of 2.24. The chart below compares the historical Sharpe Ratios of MUSI and SIFI, 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

	MUSI	SIFI	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.87	2.24	-0.38
Sharpe Ratio (All Time) Calculated using the full available price history	0.46	0.47	-0.02

Drawdowns

MUSI vs. SIFI - Drawdown Comparison

The maximum MUSI drawdown since its inception was -13.91%, smaller than the maximum SIFI drawdown of -14.68%. Use the drawdown chart below to compare losses from any high point for MUSI and SIFI.

Drawdown Indicators

	MUSI	SIFI	Difference
Max Drawdown Largest peak-to-trough decline	-13.91%	-14.68%	+0.77%
Max Drawdown (1Y) Largest decline over 1 year	-2.78%	-2.71%	-0.07%
Max Drawdown (3Y) Largest decline over 3 years	-4.16%	-3.46%	-0.70%
Current Drawdown Current decline from peak	-0.95%	-0.06%	-0.89%
Average Drawdown Average peak-to-trough decline	-4.22%	-4.83%	+0.61%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.77%	0.66%	+0.11%

Volatility

MUSI vs. SIFI - Volatility Comparison

American Century Multisector Income ETF (MUSI) has a higher volatility of 1.27% compared to Harbor Scientific Alpha Income ETF (SIFI) at 1.03%. This indicates that MUSI's price experiences larger fluctuations and is considered to be riskier than SIFI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MUSI	SIFI	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.27%	1.03%	+0.24%
Volatility (6M) Calculated over the trailing 6-month period	2.60%	2.48%	+0.12%
Volatility (1Y) Calculated over the trailing 1-year period	3.34%	3.39%	-0.05%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.85%	4.94%	-0.09%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.85%	4.94%	-0.09%

MUSI vs. SIFI - Expense Ratio Comparison

MUSI has a 0.36% expense ratio, which is lower than SIFI's 0.50% expense ratio.

Dividends

MUSI vs. SIFI - Dividend Comparison

MUSI's dividend yield for the trailing twelve months is around 5.14%, less than SIFI's 6.44% yield.

Position	TTM	2025	2024	2023	2022	2021
MUSI American Century Multisector Income ETF	5.14%	5.74%	6.00%	5.20%	4.02%	1.62%
SIFI Harbor Scientific Alpha Income ETF	6.44%	6.57%	5.87%	5.71%	3.88%	0.86%

Frequently Asked Questions

Can I hold both MUSI and SIFI in my portfolio?

MUSI and SIFI have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MUSI or SIFI?

MUSI has higher volatility (1.27%) compared to SIFI (1.03%). In terms of maximum drawdown, MUSI dropped -13.91% vs SIFI's -14.68%.

Which ETF is better, MUSI or SIFI?

On 3-year performance, SIFI leads with 7.19% vs 6.37% for MUSI. On fees, MUSI is cheaper at 0.36% per year. On volatility, SIFI 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, MUSI or SIFI?

Over the 3-year period, SIFI has performed better with a 7.19% return vs 6.37%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, MUSI or SIFI?

MUSI is cheaper with a 0.36% expense ratio, compared with 0.50% for SIFI.

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

SIFI has the higher dividend yield at 6.44%, compared with 5.14% for MUSI.

What is the main difference between MUSI and SIFI?

They also come from different issuers: American Century and Harbor. Their fees differ too: 0.36% for MUSI and 0.50% for SIFI.

Which has better risk-adjusted returns?

SIFI currently has the higher Sharpe Ratio (2.24 vs 1.87), 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.