TRSTX vs. FZOLX

Last updated Jul 14, 2026

TRSTX (T. Rowe Price Ultra Short-Term Bond Fund Class I) and FZOLX (Fidelity SAI Low Duration Income Fund) are both Ultrashort Bond funds. Over the past 5 years, TRSTX returned 3.58%/yr vs 3.59%/yr for FZOLX. At a 0.37 correlation, their price movements are largely independent. TRSTX charges 0.20%/yr vs 0.22%/yr for FZOLX.

Performance

TRSTX vs. FZOLX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price Ultra Short-Term Bond Fund Class I (TRSTX) and Fidelity SAI Low Duration Income Fund (FZOLX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with TRSTX having a 1.64% return and FZOLX slightly higher at 1.67%.

TRSTX

• 1D: 0.00%
• 1M: 0.37%
• 6M: 1.64%
• YTD: 1.64%
• 1Y: 4.29%
• 3Y*: 5.54%
• 5Y*: 3.58%
• 10Y*: —

FZOLX

• 1D: 0.00%
• 1M: 0.31%
• 6M: 1.67%
• YTD: 1.67%
• 1Y: 4.12%
• 3Y*: 5.10%
• 5Y*: 3.59%
• 10Y*: —

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

TRSTX vs. FZOLX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
TRSTX T. Rowe Price Ultra Short-Term Bond Fund Class I	1.64%	5.34%	6.41%	5.89%	-1.20%	0.29%	0.79%
FZOLX Fidelity SAI Low Duration Income Fund	1.67%	4.85%	5.59%	5.72%	0.34%	-0.04%	0.11%

Correlation

The correlation between TRSTX and FZOLX is -0.02, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.02
Correlation (3Y) Calculated over the trailing 3-year period	0.31
Correlation (5Y) Calculated over the trailing 5-year period	0.39
Correlation (All Time) Calculated using the full available price history since Sep 15, 2020	0.37

The correlation between TRSTX and FZOLX shifts across timeframes, from -0.02 (1 year) to 0.39 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

TRSTX vs. FZOLX — Risk / Return Rank

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

TRSTX

TRSTX Risk / Return Rank: 99
TRSTX Sharpe Ratio Rank: 97
TRSTX Sortino Ratio Rank: 99
TRSTX Omega Ratio Rank: 99
TRSTX Calmar Ratio Rank: 100
TRSTX Martin Ratio Rank: 99

FZOLX

FZOLX Risk / Return Rank: 99
FZOLX Sharpe Ratio Rank: 98
FZOLX Sortino Ratio Rank: 99
FZOLX Omega Ratio Rank: 99
FZOLX Calmar Ratio Rank: 99
FZOLX 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.

TRSTX vs. FZOLX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Ultra Short-Term Bond Fund Class I (TRSTX) and Fidelity SAI Low Duration Income Fund (FZOLX). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	TRSTX	FZOLX	Difference
Sharpe ratio: Return per unit of total volatility	2.97	3.25	-0.28
Sortino ratio: Return per unit of downside risk	8.92	9.88	-0.97
Omega ratio: Gain probability vs. loss probability	4.58	3.39	+1.19
Calmar ratio: Return relative to maximum drawdown	22.59	13.84	+8.75
Martin ratio: Return relative to average drawdown	51.00	71.53	-20.53

TRSTX vs. FZOLX - Sharpe Ratio Comparison

The current TRSTX Sharpe Ratio is 2.97, which is comparable to the FZOLX Sharpe Ratio of 3.25. The chart below compares the historical Sharpe Ratios of TRSTX and FZOLX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

TRSTX vs. FZOLX - Drawdown Comparison

The maximum TRSTX drawdown since its inception was -4.34%, which is greater than FZOLX's maximum drawdown of -1.10%. Use the drawdown chart below to compare losses from any high point for TRSTX and FZOLX.

Drawdown Indicators

	TRSTX	FZOLX	Difference
Max Drawdown Largest peak-to-trough decline	-4.34%	-1.10%	-3.24%
Max Drawdown (1Y) Largest decline over 1 year	-0.20%	-0.30%	+0.10%
Max Drawdown (3Y) Largest decline over 3 years	-0.59%	-0.30%	-0.29%
Max Drawdown (5Y) Largest decline over 5 years	-2.58%	-1.10%	-1.48%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.30%	-0.13%	-0.17%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.09%	0.06%	+0.03%

Volatility

TRSTX vs. FZOLX - Volatility Comparison

T. Rowe Price Ultra Short-Term Bond Fund Class I (TRSTX) and Fidelity SAI Low Duration Income Fund (FZOLX) have volatilities of 0.37% and 0.37%, 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

	TRSTX	FZOLX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.37%	0.37%	0.00%
Volatility (6M) Calculated over the trailing 6-month period	1.07%	0.88%	+0.19%
Volatility (1Y) Calculated over the trailing 1-year period	1.49%	1.27%	+0.22%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.65%	1.23%	+0.42%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.62%	1.15%	+0.47%

TRSTX vs. FZOLX - Expense Ratio Comparison

TRSTX has a 0.20% expense ratio, which is lower than FZOLX's 0.22% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

TRSTX vs. FZOLX - Dividend Comparison

TRSTX's dividend yield for the trailing twelve months is around 4.20%, less than FZOLX's 5.05% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018
FZOLX Fidelity SAI Low Duration Income Fund	5.05%	5.26%	5.15%	4.03%	1.14%	0.16%	0.01%	0.00%	0.00%
TRSTX T. Rowe Price Ultra Short-Term Bond Fund Class I	4.20%	4.79%	5.19%	3.46%	1.61%	1.28%	1.94%	2.78%	1.98%

Frequently Asked Questions

Can I hold both TRSTX and FZOLX in my portfolio?

TRSTX and FZOLX have a correlation of -0.02, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, TRSTX or FZOLX?

FZOLX has higher volatility (0.37%) compared to TRSTX (0.37%). In terms of maximum drawdown, TRSTX dropped -4.34% vs FZOLX's -1.10%.

Which has better risk-adjusted returns?

FZOLX currently has the higher Sharpe Ratio (3.25 vs 2.97), 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.