FZOMX vs. SDSI

Last updated Apr 2, 2026

Compare and contrast key facts about Fidelity SAI Short-Term Bond Fund (FZOMX) and American Century Short Duration Strategic Income ETF (SDSI).

FZOMX is managed by Fidelity. It was launched on Oct 13, 2020. SDSI is a passively managed fund by American Century that tracks the performance of the Bloomberg U.S. 1-3 Year Government/Credit Bond Index. It was launched on Oct 11, 2022.

Performance

FZOMX vs. SDSI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity SAI Short-Term Bond Fund (FZOMX) and American Century Short Duration Strategic Income ETF (SDSI). The values are adjusted to include any dividend payments, if applicable.

FZOMX vs. SDSI - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
FZOMX Fidelity SAI Short-Term Bond Fund	0.22%	5.51%	4.71%	5.21%	1.53%
SDSI American Century Short Duration Strategic Income ETF	0.23%	6.54%	5.63%	5.88%	2.05%

Returns By Period

The year-to-date returns for both investments are quite close, with FZOMX having a 0.22% return and SDSI slightly higher at 0.23%.

FZOMX

• 1D: 0.10%
• 1M: -0.41%
• YTD: 0.22%
• 6M: 1.18%
• 1Y: 3.98%
• 3Y*: 4.68%
• 5Y*: 2.25%
• 10Y*: —

SDSI

• 1D: -0.02%
• 1M: -0.65%
• YTD: 0.23%
• 6M: 1.47%
• 1Y: 4.92%
• 3Y*: 5.45%
• 5Y*: —
• 10Y*: —

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

FZOMX vs. SDSI - Expense Ratio Comparison

FZOMX has a 0.30% expense ratio, which is lower than SDSI's 0.33% expense ratio.

SDSI

American Century Short Duration Strategic Income ETF

FZOMX

Fidelity SAI Short-Term Bond Fund

Return for Risk

FZOMX vs. SDSI — Risk / Return Rank

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

FZOMX

FZOMX Risk / Return Rank: 94
FZOMX Sharpe Ratio Rank: 90
FZOMX Sortino Ratio Rank: 96
FZOMX Omega Ratio Rank: 93
FZOMX Calmar Ratio Rank: 96
FZOMX Martin Ratio Rank: 95

SDSI

SDSI Risk / Return Rank: 93
SDSI Sharpe Ratio Rank: 89
SDSI Sortino Ratio Rank: 91
SDSI Omega Ratio Rank: 95
SDSI Calmar Ratio Rank: 94
SDSI Martin Ratio Rank: 95

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.

FZOMX vs. SDSI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI Short-Term Bond Fund (FZOMX) 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.

	FZOMX	SDSI	Difference
Sharpe ratio Return per unit of total volatility	1.90	2.01	-0.11
Sortino ratio Return per unit of downside risk	3.42	2.77	+0.65
Omega ratio Gain probability vs. loss probability	1.47	1.48	-0.01
Calmar ratio Return relative to maximum drawdown	3.56	3.85	-0.29
Martin ratio Return relative to average drawdown	14.10	16.05	-1.95
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FZOMX vs. SDSI - Sharpe Ratio Comparison

The current FZOMX Sharpe Ratio is 1.90, which is comparable to the SDSI Sharpe Ratio of 2.01. The chart below compares the historical Sharpe Ratios of FZOMX and SDSI, 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

	FZOMX	SDSI	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.90	2.01	-0.11
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.04	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.98	2.56	-1.57

Correlation

The correlation between FZOMX and SDSI is 0.69, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.

Dividends

FZOMX vs. SDSI - Dividend Comparison

FZOMX's dividend yield for the trailing twelve months is around 4.23%, less than SDSI's 4.54% yield.

	TTM	2025	2024	2023	2022	2021	2020
FZOMX Fidelity SAI Short-Term Bond Fund	4.23%	4.64%	4.27%	3.26%	0.76%	0.41%	0.07%
SDSI American Century Short Duration Strategic Income ETF	4.54%	4.91%	5.49%	5.37%	0.98%	0.00%	0.00%

Drawdowns

FZOMX vs. SDSI - Drawdown Comparison

The maximum FZOMX drawdown since its inception was -6.12%, which is greater than SDSI's maximum drawdown of -1.29%. Use the drawdown chart below to compare losses from any high point for FZOMX and SDSI.

Drawdown Indicators

	FZOMX	SDSI	Difference
Max Drawdown Largest peak-to-trough decline	-6.12%	-1.29%	-4.83%
Max Drawdown (1Y) Largest decline over 1 year	-1.23%	-1.29%	+0.06%
Max Drawdown (5Y) Largest decline over 5 years	-6.12%	—	—
Current Drawdown Current decline from peak	-0.61%	-0.70%	+0.09%
Average Drawdown Average peak-to-trough decline	-1.32%	-0.25%	-1.07%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.31%	0.31%	0.00%

Volatility

FZOMX vs. SDSI - Volatility Comparison

The current volatility for Fidelity SAI Short-Term Bond Fund (FZOMX) is 0.70%, while American Century Short Duration Strategic Income ETF (SDSI) has a volatility of 0.79%. This indicates that FZOMX 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

	FZOMX	SDSI	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.70%	0.79%	-0.09%
Volatility (6M) Calculated over the trailing 6-month period	1.38%	1.19%	+0.19%
Volatility (1Y) Calculated over the trailing 1-year period	2.14%	2.46%	-0.32%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.17%	2.31%	-0.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.08%	2.31%	-0.23%