SPTS vs. TFLO

Last updated Apr 1, 2026

Compare and contrast key facts about SPDR Portfolio Short Term Treasury ETF (SPTS) and iShares Treasury Floating Rate Bond ETF (TFLO).

SPTS and TFLO are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. SPTS is a passively managed fund by State Street that tracks the performance of the Bloomberg U.S. Treasury 1-3 Year Index. It was launched on Nov 30, 2011. TFLO is a passively managed fund by iShares that tracks the performance of the Barclays U.S. Treasury Floating Rate Index. It was launched on Feb 3, 2014. Both SPTS and TFLO are passive ETFs, meaning that they are not actively managed but aim to replicate the performance of the underlying index as closely as possible.

Performance

SPTS vs. TFLO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SPDR Portfolio Short Term Treasury ETF (SPTS) and iShares Treasury Floating Rate Bond ETF (TFLO). The values are adjusted to include any dividend payments, if applicable.

SPTS vs. TFLO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
SPTS SPDR Portfolio Short Term Treasury ETF	0.29%	5.05%	4.20%	4.27%	-3.86%	-0.72%	3.23%	3.56%	1.08%	0.59%
TFLO iShares Treasury Floating Rate Bond ETF	0.92%	4.22%	5.34%	5.12%	1.99%	-0.02%	0.43%	2.04%	1.76%	1.01%

Returns By Period

In the year-to-date period, SPTS achieves a 0.29% return, which is significantly lower than TFLO's 0.92% return. Over the past 10 years, SPTS has underperformed TFLO with an annualized return of 1.67%, while TFLO has yielded a comparatively higher 2.27% annualized return.

SPTS

• 1D: 0.07%
• 1M: -0.43%
• YTD: 0.29%
• 6M: 1.46%
• 1Y: 3.83%
• 3Y*: 4.05%
• 5Y*: 1.81%
• 10Y*: 1.67%

TFLO

• 1D: 0.00%
• 1M: 0.30%
• YTD: 0.92%
• 6M: 1.98%
• 1Y: 4.08%
• 3Y*: 4.84%
• 5Y*: 3.49%
• 10Y*: 2.27%

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

SPTS vs. TFLO - Expense Ratio Comparison

SPTS has a 0.03% expense ratio, which is lower than TFLO's 0.15% 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%.

TFLO

iShares Treasury Floating Rate Bond ETF

SPTS

SPDR Portfolio Short Term Treasury ETF

Return for Risk

SPTS vs. TFLO — Risk / Return Rank

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

SPTS

SPTS Risk / Return Rank: 97
SPTS Sharpe Ratio Rank: 96
SPTS Sortino Ratio Rank: 98
SPTS Omega Ratio Rank: 97
SPTS Calmar Ratio Rank: 97
SPTS Martin Ratio Rank: 96

TFLO

TFLO Risk / Return Rank: 100
TFLO Sharpe Ratio Rank: 100
TFLO Sortino Ratio Rank: 100
TFLO Omega Ratio Rank: 100
TFLO Calmar Ratio Rank: 100
TFLO Martin Ratio Rank: 100

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.

SPTS vs. TFLO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SPDR Portfolio Short Term Treasury ETF (SPTS) and iShares Treasury Floating Rate Bond ETF (TFLO). 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.

	SPTS	TFLO	Difference
Sharpe ratio Return per unit of total volatility	2.58	13.83	-11.25
Sortino ratio Return per unit of downside risk	4.09	45.28	-41.19
Omega ratio Gain probability vs. loss probability	1.55	11.01	-9.46
Calmar ratio Return relative to maximum drawdown	4.64	207.06	-202.41
Martin ratio Return relative to average drawdown	17.61	735.43	-717.82
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

SPTS vs. TFLO - Sharpe Ratio Comparison

The current SPTS Sharpe Ratio is 2.58, which is lower than the TFLO Sharpe Ratio of 13.83. The chart below compares the historical Sharpe Ratios of SPTS and TFLO, 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

	SPTS	TFLO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.58	13.83	-11.25
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.92	9.83	-8.91
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.97	4.54	-3.57
Sharpe Ratio (All Time) Calculated using the full available price history	0.49	0.96	-0.47

Correlation

The correlation between SPTS and TFLO is 0.03, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

SPTS vs. TFLO - Dividend Comparison

SPTS's dividend yield for the trailing twelve months is around 3.97%, less than TFLO's 4.05% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
SPTS SPDR Portfolio Short Term Treasury ETF	3.97%	3.99%	4.25%	3.61%	1.27%	0.19%	0.70%	2.21%	2.04%	1.20%	0.95%	0.83%
TFLO iShares Treasury Floating Rate Bond ETF	4.05%	4.16%	5.21%	4.88%	1.68%	0.00%	0.36%	2.08%	1.65%	0.86%	0.31%	0.15%

Drawdowns

SPTS vs. TFLO - Drawdown Comparison

The maximum SPTS drawdown since its inception was -5.83%, which is greater than TFLO's maximum drawdown of -5.01%. Use the drawdown chart below to compare losses from any high point for SPTS and TFLO.

Drawdown Indicators

	SPTS	TFLO	Difference
Max Drawdown Largest peak-to-trough decline	-5.83%	-5.01%	-0.82%
Max Drawdown (1Y) Largest decline over 1 year	-0.84%	-0.02%	-0.82%
Max Drawdown (5Y) Largest decline over 5 years	-5.71%	-0.13%	-5.58%
Max Drawdown (10Y) Largest decline over 10 years	-5.71%	-0.50%	-5.21%
Current Drawdown Current decline from peak	-0.43%	0.00%	-0.43%
Average Drawdown Average peak-to-trough decline	-1.74%	-0.10%	-1.64%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.22%	0.01%	+0.21%

Volatility

SPTS vs. TFLO - Volatility Comparison

SPDR Portfolio Short Term Treasury ETF (SPTS) has a higher volatility of 0.50% compared to iShares Treasury Floating Rate Bond ETF (TFLO) at 0.07%. This indicates that SPTS's price experiences larger fluctuations and is considered to be riskier than TFLO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	SPTS	TFLO	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.50%	0.07%	+0.43%
Volatility (6M) Calculated over the trailing 6-month period	0.88%	0.21%	+0.67%
Volatility (1Y) Calculated over the trailing 1-year period	1.49%	0.30%	+1.19%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.98%	0.36%	+1.62%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.73%	0.50%	+1.23%