FUSI vs. SDSI

Last updated Jun 4, 2026

FUSI (American Century Multisector Floating Income ETF) and SDSI (American Century Short Duration Strategic Income ETF) are both exchange-traded funds - FUSI is a Ultrashort Bond fund actively managed by American Century, while SDSI is a Short-Term Bond fund tracking the Bloomberg U.S. 1-3 Year Government/Credit Bond Index. FUSI is actively managed, while SDSI is passively managed. Over the past 3 years, FUSI returned 5.97%/yr vs 5.77%/yr for SDSI. At a 0.25 correlation, their price movements are largely independent. FUSI charges 0.28%/yr vs 0.33%/yr for SDSI.

Performance

FUSI vs. SDSI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Multisector Floating Income ETF (FUSI) and American Century Short Duration Strategic Income ETF (SDSI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FUSI achieves a 2.39% return, which is significantly higher than SDSI's 1.22% return.

FUSI

• 1D: -0.02%
• 1M: 0.77%
• YTD: 2.39%
• 6M: 2.67%
• 1Y: 5.43%
• 3Y*: 5.97%
• 5Y*: —
• 10Y*: —

SDSI

• 1D: -0.04%
• 1M: 0.35%
• YTD: 1.22%
• 6M: 1.66%
• 1Y: 5.27%
• 3Y*: 5.77%
• 5Y*: —
• 10Y*: —

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

FUSI vs. SDSI - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
FUSI American Century Multisector Floating Income ETF	2.39%	4.85%	6.19%	5.89%
SDSI American Century Short Duration Strategic Income ETF	1.22%	6.54%	5.63%	4.65%

Correlation

The correlation between FUSI and SDSI is 0.33, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.33
Correlation (3Y) Calculated over the trailing 3-year period	0.28
Correlation (All Time) Calculated using the full available price history since Mar 17, 2023	0.25

Return for Risk

FUSI vs. SDSI — Risk / Return Rank

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

FUSI

FUSI Risk / Return Rank: 98
FUSI Sharpe Ratio Rank: 98
FUSI Sortino Ratio Rank: 99
FUSI Omega Ratio Rank: 99
FUSI Calmar Ratio Rank: 97
FUSI Martin Ratio Rank: 99

SDSI

SDSI Risk / Return Rank: 91
SDSI Sharpe Ratio Rank: 91
SDSI Sortino Ratio Rank: 94
SDSI Omega Ratio Rank: 93
SDSI Calmar Ratio Rank: 84
SDSI Martin Ratio Rank: 90

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.

FUSI vs. SDSI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Multisector Floating Income ETF (FUSI) and American Century Short Duration Strategic Income ETF (SDSI). 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.

	FUSI	SDSI	Difference
Sharpe ratio Return per unit of total volatility	6.05	3.25	+2.81
Sortino ratio Return per unit of downside risk	9.35	5.01	+4.34
Omega ratio Gain probability vs. loss probability	2.99	1.66	+1.33
Calmar ratio Return relative to maximum drawdown	12.25	4.53	+7.72
Martin ratio Return relative to average drawdown	91.02	21.22	+69.79
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FUSI vs. SDSI - Sharpe Ratio Comparison

The current FUSI Sharpe Ratio is 6.05, which is higher than the SDSI Sharpe Ratio of 3.25. The chart below compares the historical Sharpe Ratios of FUSI and SDSI, 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

	FUSI	SDSI	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	6.05	3.25	+2.81
Sharpe Ratio (All Time) Calculated using the full available price history	5.57	2.60	+2.97

Drawdowns

FUSI vs. SDSI - Drawdown Comparison

The maximum FUSI drawdown since its inception was -0.70%, smaller than the maximum SDSI drawdown of -1.29%. Use the drawdown chart below to compare losses from any high point for FUSI and SDSI.

Drawdown Indicators

	FUSI	SDSI	Difference
Max Drawdown Largest peak-to-trough decline	-0.70%	-1.29%	+0.59%
Max Drawdown (1Y) Largest decline over 1 year	-0.45%	-1.17%	+0.72%
Max Drawdown (3Y) Largest decline over 3 years	-0.70%	-1.29%	+0.59%
Current Drawdown Current decline from peak	-0.03%	-0.07%	+0.04%
Average Drawdown Average peak-to-trough decline	-0.04%	-0.24%	+0.20%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.06%	0.25%	-0.19%

Volatility

FUSI vs. SDSI - Volatility Comparison

The current volatility for American Century Multisector Floating Income ETF (FUSI) is 0.25%, while American Century Short Duration Strategic Income ETF (SDSI) has a volatility of 0.41%. This indicates that FUSI experiences smaller price fluctuations and is considered to be less risky than SDSI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FUSI	SDSI	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.25%	0.41%	-0.16%
Volatility (6M) Calculated over the trailing 6-month period	0.61%	1.14%	-0.53%
Volatility (1Y) Calculated over the trailing 1-year period	0.90%	1.63%	-0.73%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.09%	2.28%	-1.19%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.09%	2.28%	-1.19%

FUSI vs. SDSI - Expense Ratio Comparison

FUSI has a 0.28% expense ratio, which is lower than SDSI's 0.33% expense ratio.

Dividends

FUSI vs. SDSI - Dividend Comparison

FUSI's dividend yield for the trailing twelve months is around 4.85%, more than SDSI's 4.42% yield.

Position	TTM	2025	2024	2023	2022
FUSI American Century Multisector Floating Income ETF	4.85%	5.28%	5.98%	4.97%	0.00%
SDSI American Century Short Duration Strategic Income ETF	4.42%	4.91%	5.49%	5.37%	0.98%

Frequently Asked Questions

Can I hold both FUSI and SDSI in my portfolio?

FUSI and SDSI have a correlation of 0.33, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FUSI or SDSI?

SDSI has higher volatility (0.41%) compared to FUSI (0.25%). In terms of maximum drawdown, FUSI dropped -0.70% vs SDSI's -1.29%.

Which ETF is better, FUSI or SDSI?

On 3-year performance, FUSI leads with 5.97% vs 5.77% for SDSI. On fees, FUSI is cheaper at 0.28% per year. On volatility, FUSI has been the lower-risk option at 0.25%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, FUSI or SDSI?

Over the 3-year period, FUSI has performed better with a 5.97% return vs 5.77%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, FUSI or SDSI?

FUSI is cheaper with a 0.28% expense ratio, compared with 0.33% for SDSI.

Which ETF pays a higher dividend yield, FUSI or SDSI?

FUSI has the higher dividend yield at 4.85%, compared with 4.42% for SDSI.

What is the main difference between FUSI and SDSI?

FUSI is categorized as Ultrashort Bond, while SDSI is Short-Term Bond. Their fees differ too: 0.28% for FUSI and 0.33% for SDSI.

Which has better risk-adjusted returns?

FUSI currently has the higher Sharpe Ratio (6.05 vs 3.25), 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.