FZOMX vs. DFAIX

Last updated Jun 4, 2026

FZOMX (Fidelity SAI Short-Term Bond Fund) and DFAIX (DFA Short-Duration Real Return Portfolio) are both Short-Term Bond funds. Over the past 5 years, FZOMX returned 2.33%/yr vs 3.84%/yr for DFAIX. At a 0.35 correlation, their price movements are largely independent. FZOMX charges 0.30%/yr vs 0.22%/yr for DFAIX.

Performance

FZOMX vs. DFAIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity SAI Short-Term Bond Fund (FZOMX) and DFA Short-Duration Real Return Portfolio (DFAIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FZOMX achieves a 0.93% return, which is significantly lower than DFAIX's 2.57% return.

FZOMX

• 1D: 0.00%
• 1M: 0.24%
• YTD: 0.93%
• 6M: 1.18%
• 1Y: 4.18%
• 3Y*: 4.90%
• 5Y*: 2.33%
• 10Y*: —

DFAIX

• 1D: 0.00%
• 1M: 0.56%
• YTD: 2.57%
• 6M: 2.56%
• 1Y: 4.85%
• 3Y*: 5.79%
• 5Y*: 3.84%
• 10Y*: 3.33%

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

FZOMX vs. DFAIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
FZOMX Fidelity SAI Short-Term Bond Fund	0.93%	5.51%	4.71%	5.21%	-3.71%	-0.69%	0.37%
DFAIX DFA Short-Duration Real Return Portfolio	2.57%	4.86%	6.38%	5.64%	-2.77%	5.40%	1.32%

Correlation

The correlation between FZOMX and DFAIX is 0.21, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.21
Correlation (3Y) Calculated over the trailing 3-year period	0.25
Correlation (5Y) Calculated over the trailing 5-year period	0.36
Correlation (All Time) Calculated using the full available price history since Sep 16, 2020	0.35

The correlation between FZOMX and DFAIX shifts across timeframes, from 0.21 (1 year) to 0.36 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

FZOMX vs. DFAIX — Risk / Return Rank

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

FZOMX

FZOMX Risk / Return Rank: 72
FZOMX Sharpe Ratio Rank: 47
FZOMX Sortino Ratio Rank: 84
FZOMX Omega Ratio Rank: 77
FZOMX Calmar Ratio Rank: 73
FZOMX Martin Ratio Rank: 79

DFAIX

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

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. DFAIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity SAI Short-Term Bond Fund (FZOMX) and DFA Short-Duration Real Return Portfolio (DFAIX). 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	DFAIX	Difference
Sharpe ratio: Return per unit of total volatility	2.01	4.44	-2.43
Sortino ratio: Return per unit of downside risk	3.96	7.79	-3.83
Omega ratio: Gain probability vs. loss probability	1.50	2.45	-0.95
Calmar ratio: Return relative to maximum drawdown	3.33	10.39	-7.06
Martin ratio: Return relative to average drawdown	14.91	48.50	-33.59
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. DFAIX - Sharpe Ratio Comparison

The current FZOMX Sharpe Ratio is 2.01, which is lower than the DFAIX Sharpe Ratio of 4.44. The chart below compares the historical Sharpe Ratios of FZOMX and DFAIX, 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

	FZOMX	DFAIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.01	4.44	-2.43
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.06	1.22	-0.15
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	1.31	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.01	1.13	-0.12

Drawdowns

FZOMX vs. DFAIX - Drawdown Comparison

The maximum FZOMX drawdown since its inception was -6.12%, which is greater than DFAIX's maximum drawdown of -5.63%. Use the drawdown chart below to compare losses from any high point for FZOMX and DFAIX.

Drawdown Indicators

	FZOMX	DFAIX	Difference
Max Drawdown Largest peak-to-trough decline	-6.12%	-5.63%	-0.49%
Max Drawdown (1Y) Largest decline over 1 year	-1.23%	-0.47%	-0.76%
Max Drawdown (3Y) Largest decline over 3 years	-1.23%	-3.12%	+1.89%
Max Drawdown (5Y) Largest decline over 5 years	-6.12%	-5.46%	-0.66%
Max Drawdown (10Y) Largest decline over 10 years	—	-5.63%	—
Current Drawdown Current decline from peak	-0.10%	0.00%	-0.10%
Average Drawdown Average peak-to-trough decline	-1.29%	-0.94%	-0.35%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.27%	0.10%	+0.17%

Volatility

FZOMX vs. DFAIX - Volatility Comparison

Fidelity SAI Short-Term Bond Fund (FZOMX) has a higher volatility of 0.63% compared to DFA Short-Duration Real Return Portfolio (DFAIX) at 0.47%. This indicates that FZOMX's price experiences larger fluctuations and is considered to be riskier than DFAIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FZOMX	DFAIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.63%	0.47%	+0.16%
Volatility (6M) Calculated over the trailing 6-month period	1.46%	0.93%	+0.53%
Volatility (1Y) Calculated over the trailing 1-year period	2.04%	1.10%	+0.94%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.21%	3.18%	-0.97%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.08%	2.55%	-0.47%

FZOMX vs. DFAIX - Expense Ratio Comparison

FZOMX has a 0.30% expense ratio, which is higher than DFAIX's 0.22% expense ratio.

Dividends

FZOMX vs. DFAIX - Dividend Comparison

FZOMX's dividend yield for the trailing twelve months is around 4.53%, which matches DFAIX's 4.54% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
DFAIX DFA Short-Duration Real Return Portfolio	4.54%	4.65%	4.14%	3.66%	1.68%	0.98%	0.82%	2.53%	2.72%	1.71%	1.41%	1.29%
FZOMX Fidelity SAI Short-Term Bond Fund	4.53%	4.64%	4.27%	3.26%	0.76%	0.41%	0.07%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FZOMX and DFAIX in my portfolio?

FZOMX and DFAIX have a correlation of 0.21, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FZOMX or DFAIX?

FZOMX has higher volatility (0.63%) compared to DFAIX (0.47%). In terms of maximum drawdown, FZOMX dropped -6.12% vs DFAIX's -5.63%.

Which has better risk-adjusted returns?

DFAIX currently has the higher Sharpe Ratio (4.44 vs 2.01), 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.