TBLL vs. BILS

Last updated Jun 4, 2026

TBLL (Invesco Short Term Treasury ETF) and BILS (SPDR Bloomberg 3-12 Month T-Bill ETF) are both Ultrashort Bond funds - TBLL tracks the ICE U.S. Treasury Short Bond Index while BILS tracks the Bloomberg 3-12 Month U.S. Treasury Bill Index. Both are passively managed. Over the past 5 years, TBLL returned 3.35%/yr vs 3.29%/yr for BILS. A 0.60 correlation means they provide meaningful diversification when combined. TBLL charges 0.08%/yr vs 0.14%/yr for BILS.

Performance

TBLL vs. BILS - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco Short Term Treasury ETF (TBLL) and SPDR Bloomberg 3-12 Month T-Bill ETF (BILS). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with TBLL having a 1.43% return and BILS slightly lower at 1.40%.

TBLL

• 1D: 0.01%
• 1M: 0.29%
• YTD: 1.43%
• 6M: 1.74%
• 1Y: 3.93%
• 3Y*: 4.66%
• 5Y*: 3.35%
• 10Y*: —

BILS

• 1D: -0.01%
• 1M: 0.28%
• YTD: 1.40%
• 6M: 1.73%
• 1Y: 3.90%
• 3Y*: 4.66%
• 5Y*: 3.29%
• 10Y*: —

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

TBLL vs. BILS - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
TBLL Invesco Short Term Treasury ETF	1.43%	4.21%	5.11%	5.01%	1.11%	-0.01%	0.01%
BILS SPDR Bloomberg 3-12 Month T-Bill ETF	1.40%	4.23%	5.17%	4.92%	0.90%	-0.08%	0.00%

Correlation

The correlation between TBLL and BILS is 0.54, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.54
Correlation (3Y) Calculated over the trailing 3-year period	0.45
Correlation (5Y) Calculated over the trailing 5-year period	0.59
Correlation (All Time) Calculated using the full available price history since Sep 25, 2020	0.60

The correlation between TBLL and BILS shifts across timeframes, from 0.45 (3 years) to 0.60 (all time), reflecting how their relationship changes across market environments.

Return for Risk

TBLL vs. BILS — Risk / Return Rank

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

TBLL

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

BILS

BILS Risk / Return Rank: 100
BILS Sharpe Ratio Rank: 100
BILS Sortino Ratio Rank: 100
BILS Omega Ratio Rank: 100
BILS Calmar Ratio Rank: 100
BILS 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.

TBLL vs. BILS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco Short Term Treasury ETF (TBLL) and SPDR Bloomberg 3-12 Month T-Bill ETF (BILS). 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.

	TBLL	BILS	Difference
Sharpe ratio: Return per unit of total volatility	20.94	16.80	+4.14
Sortino ratio: Return per unit of downside risk	218.31	100.82	+117.49
Omega ratio: Gain probability vs. loss probability	102.92	42.08	+60.84
Calmar ratio: Return relative to maximum drawdown	416.84	129.91	+286.93
Martin ratio: Return relative to average drawdown	3,533.11	1,442.41	+2,090.71
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TBLL vs. BILS - Sharpe Ratio Comparison

The current TBLL Sharpe Ratio is 20.94, which is comparable to the BILS Sharpe Ratio of 16.80. The chart below compares the historical Sharpe Ratios of TBLL and BILS, 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

	TBLL	BILS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	20.94	16.80	+4.14
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	7.53	10.79	-3.26
Sharpe Ratio (All Time) Calculated using the full available price history	4.26	9.79	-5.54

Drawdowns

TBLL vs. BILS - Drawdown Comparison

The maximum TBLL drawdown since its inception was -0.63%, which is greater than BILS's maximum drawdown of -0.41%. Use the drawdown chart below to compare losses from any high point for TBLL and BILS.

Drawdown Indicators

	TBLL	BILS	Difference
Max Drawdown Largest peak-to-trough decline	-0.63%	-0.41%	-0.22%
Max Drawdown (1Y) Largest decline over 1 year	-0.01%	-0.03%	+0.02%
Max Drawdown (3Y) Largest decline over 3 years	-0.36%	-0.04%	-0.32%
Max Drawdown (5Y) Largest decline over 5 years	-0.36%	-0.38%	+0.02%
Current Drawdown Current decline from peak	0.00%	-0.01%	+0.01%
Average Drawdown Average peak-to-trough decline	-0.14%	-0.04%	-0.10%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.00%	0.00%	0.00%

Volatility

TBLL vs. BILS - Volatility Comparison

The current volatility for Invesco Short Term Treasury ETF (TBLL) is 0.05%, while SPDR Bloomberg 3-12 Month T-Bill ETF (BILS) has a volatility of 0.06%. This indicates that TBLL experiences smaller price fluctuations and is considered to be less risky than BILS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TBLL	BILS	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.05%	0.06%	-0.01%
Volatility (6M) Calculated over the trailing 6-month period	0.12%	0.14%	-0.02%
Volatility (1Y) Calculated over the trailing 1-year period	0.19%	0.23%	-0.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.45%	0.31%	+0.14%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.56%	0.30%	+0.26%

TBLL vs. BILS - Expense Ratio Comparison

TBLL has a 0.08% expense ratio, which is lower than BILS's 0.14% 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

TBLL vs. BILS - Dividend Comparison

TBLL's dividend yield for the trailing twelve months is around 3.81%, which matches BILS's 3.81% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
BILS SPDR Bloomberg 3-12 Month T-Bill ETF	3.81%	4.08%	5.01%	4.98%	1.61%	0.00%	0.00%	0.00%	0.00%	0.00%
TBLL Invesco Short Term Treasury ETF	3.81%	4.08%	4.99%	4.63%	1.37%	0.03%	0.80%	2.08%	1.69%	0.71%

Frequently Asked Questions

Can I hold both TBLL and BILS in my portfolio?

TBLL and BILS have a correlation of 0.54, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, TBLL or BILS?

BILS has higher volatility (0.06%) compared to TBLL (0.05%). In terms of maximum drawdown, TBLL dropped -0.63% vs BILS's -0.41%.

Which ETF is better, TBLL or BILS?

On 5-year performance, TBLL leads with 3.35% vs 3.29% for BILS. On fees, TBLL is cheaper at 0.08% per year. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, TBLL or BILS?

Over the 5-year period, TBLL has performed better with a 3.35% return vs 3.29%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, TBLL or BILS?

TBLL is cheaper with a 0.08% expense ratio, compared with 0.14% for BILS.

Which ETF pays a higher dividend yield, TBLL or BILS?

TBLL and BILS have nearly identical dividend yields, around 3.81%.

What is the main difference between TBLL and BILS?

TBLL tracks ICE U.S. Treasury Short Bond Index, while BILS tracks Bloomberg 3-12 Month U.S. Treasury Bill Index. They also come from different issuers: Invesco and State Street. Their fees differ too: 0.08% for TBLL and 0.14% for BILS.

Which has better risk-adjusted returns?

TBLL currently has the higher Sharpe Ratio (20.94 vs 16.80), 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.