SIFI vs. MUSI

Last updated Apr 1, 2026

Compare and contrast key facts about Harbor Scientific Alpha Income ETF (SIFI) and American Century Multisector Income ETF (MUSI).

SIFI and MUSI are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. SIFI is an actively managed fund by Harbor. It was launched on Sep 14, 2021. MUSI is an actively managed fund by American Century. It was launched on Jun 29, 2021.

Performance

SIFI vs. MUSI - Performance Comparison

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

SIFI vs. MUSI - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
SIFI Harbor Scientific Alpha Income ETF	-0.51%	8.83%	5.05%	8.75%	-10.58%	-1.05%
MUSI American Century Multisector Income ETF	-0.07%	8.32%	5.14%	7.51%	-10.33%	-0.47%

Returns By Period

In the year-to-date period, SIFI achieves a -0.51% return, which is significantly lower than MUSI's -0.07% return.

SIFI

• 1D: 0.75%
• 1M: -1.81%
• YTD: -0.51%
• 6M: 0.91%
• 1Y: 6.27%
• 3Y*: 6.46%
• 5Y*: —
• 10Y*: —

MUSI

• 1D: 0.60%
• 1M: -1.80%
• YTD: -0.07%
• 6M: 1.26%
• 1Y: 5.87%
• 3Y*: 5.93%
• 5Y*: —
• 10Y*: —

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

SIFI vs. MUSI - Expense Ratio Comparison

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

SIFI

Harbor Scientific Alpha Income ETF

MUSI

American Century Multisector Income ETF

Return for Risk

SIFI vs. MUSI — Risk / Return Rank

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

SIFI

SIFI Risk / Return Rank: 76
SIFI Sharpe Ratio Rank: 77
SIFI Sortino Ratio Rank: 78
SIFI Omega Ratio Rank: 76
SIFI Calmar Ratio Rank: 74
SIFI Martin Ratio Rank: 74

MUSI

MUSI Risk / Return Rank: 75
MUSI Sharpe Ratio Rank: 75
MUSI Sortino Ratio Rank: 70
MUSI Omega Ratio Rank: 77
MUSI Calmar Ratio Rank: 75
MUSI Martin Ratio Rank: 76

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.

SIFI vs. MUSI - Risk-Adjusted Trends Comparison

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

	SIFI	MUSI	Difference
Sharpe ratio Return per unit of total volatility	1.42	1.35	+0.07
Sortino ratio Return per unit of downside risk	2.02	1.77	+0.25
Omega ratio Gain probability vs. loss probability	1.29	1.29	0.00
Calmar ratio Return relative to maximum drawdown	1.97	1.98	-0.02
Martin ratio Return relative to average drawdown	8.02	8.07	-0.05
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SIFI vs. MUSI - Sharpe Ratio Comparison

The current SIFI Sharpe Ratio is 1.42, which is comparable to the MUSI Sharpe Ratio of 1.35. The chart below compares the historical Sharpe Ratios of SIFI and MUSI, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	SIFI	MUSI	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.42	1.35	+0.07
Sharpe Ratio (All Time) Calculated using the full available price history	0.41	0.43	-0.03

Correlation

The correlation between SIFI and MUSI is 0.80, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

SIFI vs. MUSI - Dividend Comparison

SIFI's dividend yield for the trailing twelve months is around 6.62%, more than MUSI's 5.74% yield.

	TTM	2025	2024	2023	2022	2021
SIFI Harbor Scientific Alpha Income ETF	6.62%	6.57%	5.87%	5.71%	3.88%	0.86%
MUSI American Century Multisector Income ETF	5.74%	5.74%	6.00%	5.20%	4.02%	1.62%

Drawdowns

SIFI vs. MUSI - Drawdown Comparison

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

Drawdown Indicators

	SIFI	MUSI	Difference
Max Drawdown Largest peak-to-trough decline	-14.68%	-13.91%	-0.77%
Max Drawdown (1Y) Largest decline over 1 year	-3.20%	-2.99%	-0.21%
Current Drawdown Current decline from peak	-1.81%	-1.80%	-0.01%
Average Drawdown Average peak-to-trough decline	-4.99%	-4.33%	-0.66%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.78%	0.74%	+0.04%

Volatility

SIFI vs. MUSI - Volatility Comparison

Harbor Scientific Alpha Income ETF (SIFI) and American Century Multisector Income ETF (MUSI) have volatilities of 1.67% and 1.70%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SIFI	MUSI	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.67%	1.70%	-0.03%
Volatility (6M) Calculated over the trailing 6-month period	2.29%	2.27%	+0.02%
Volatility (1Y) Calculated over the trailing 1-year period	4.42%	4.35%	+0.07%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.98%	4.88%	+0.10%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.98%	4.88%	+0.10%