BIL vs. TFLO

Last updated Apr 1, 2026

Compare and contrast key facts about SPDR Barclays 1-3 Month T-Bill ETF (BIL) and iShares Treasury Floating Rate Bond ETF (TFLO).

BIL and TFLO are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. BIL is a passively managed fund by State Street that tracks the performance of the Barclays Capital U.S. 1-3 Month Treasury Bill Index. It was launched on May 25, 2007. 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 BIL 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

BIL vs. TFLO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in SPDR Barclays 1-3 Month T-Bill ETF (BIL) and iShares Treasury Floating Rate Bond ETF (TFLO). The values are adjusted to include any dividend payments, if applicable.

BIL vs. TFLO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
BIL SPDR Barclays 1-3 Month T-Bill ETF	0.85%	4.15%	5.19%	4.94%	1.40%	-0.10%	0.40%	2.03%	1.74%	0.69%
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, BIL achieves a 0.85% return, which is significantly lower than TFLO's 0.92% return. Over the past 10 years, BIL has underperformed TFLO with an annualized return of 2.12%, while TFLO has yielded a comparatively higher 2.27% annualized return.

BIL

• 1D: 0.00%
• 1M: 0.29%
• YTD: 0.85%
• 6M: 1.84%
• 1Y: 3.99%
• 3Y*: 4.70%
• 5Y*: 3.27%
• 10Y*: 2.12%

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)

BIL vs. TFLO - Expense Ratio Comparison

BIL has a 0.14% 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

BIL

SPDR Barclays 1-3 Month T-Bill ETF

Return for Risk

BIL vs. TFLO — Risk / Return Rank

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

BIL

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

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.

BIL vs. TFLO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for SPDR Barclays 1-3 Month T-Bill ETF (BIL) 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.

	BIL	TFLO	Difference
Sharpe ratio Return per unit of total volatility	19.52	13.83	+5.69
Sortino ratio Return per unit of downside risk	254.04	45.28	+208.76
Omega ratio Gain probability vs. loss probability	180.28	11.01	+169.27
Calmar ratio Return relative to maximum drawdown	365.54	207.06	+158.48
Martin ratio Return relative to average drawdown	4,104.04	735.43	+3,368.61
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BIL vs. TFLO - Sharpe Ratio Comparison

The current BIL Sharpe Ratio is 19.52, which is higher than the TFLO Sharpe Ratio of 13.83. The chart below compares the historical Sharpe Ratios of BIL 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

	BIL	TFLO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	19.52	13.83	+5.69
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	12.54	9.83	+2.71
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	8.22	4.54	+3.68
Sharpe Ratio (All Time) Calculated using the full available price history	2.72	0.96	+1.76

Correlation

The correlation between BIL and TFLO is 0.20, 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

BIL vs. TFLO - Dividend Comparison

BIL's dividend yield for the trailing twelve months is around 4.01%, which matches TFLO's 4.05% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BIL SPDR Barclays 1-3 Month T-Bill ETF	4.01%	4.13%	5.03%	4.92%	1.35%	0.00%	0.30%	2.05%	1.66%	0.68%	0.07%	0.00%
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

BIL vs. TFLO - Drawdown Comparison

The maximum BIL drawdown since its inception was -0.78%, smaller than the maximum TFLO drawdown of -5.01%. Use the drawdown chart below to compare losses from any high point for BIL and TFLO.

Drawdown Indicators

	BIL	TFLO	Difference
Max Drawdown Largest peak-to-trough decline	-0.78%	-5.01%	+4.23%
Max Drawdown (1Y) Largest decline over 1 year	-0.01%	-0.02%	+0.01%
Max Drawdown (5Y) Largest decline over 5 years	-0.12%	-0.13%	+0.01%
Max Drawdown (10Y) Largest decline over 10 years	-0.21%	-0.50%	+0.29%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.26%	-0.10%	-0.16%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.00%	0.01%	-0.01%

Volatility

BIL vs. TFLO - Volatility Comparison

The current volatility for SPDR Barclays 1-3 Month T-Bill ETF (BIL) is 0.05%, while iShares Treasury Floating Rate Bond ETF (TFLO) has a volatility of 0.07%. This indicates that BIL experiences smaller price fluctuations and is considered to be less risky than TFLO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BIL	TFLO	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.05%	0.07%	-0.02%
Volatility (6M) Calculated over the trailing 6-month period	0.14%	0.21%	-0.07%
Volatility (1Y) Calculated over the trailing 1-year period	0.21%	0.30%	-0.09%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.26%	0.36%	-0.10%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.26%	0.50%	-0.24%