OBIL vs. TBIL

Last updated Jun 4, 2026

OBIL (US Treasury 12 Month Bill ETF) and TBIL (US Treasury 3 Month Bill ETF) are both exchange-traded funds - OBIL is a Government Bonds fund tracking the ICE BofA US 1-Year Treasury Bill Index - Benchmark TR Gross, while TBIL is a Ultrashort Bond fund tracking the ICE BofA US Treasury Bill 3 Month Index. Both are passively managed. Over the past 3 years, OBIL returned 4.55%/yr vs 4.64%/yr for TBIL. At a 0.32 correlation, their price movements are largely independent. Both charge a 0.15% expense ratio.

Performance

OBIL vs. TBIL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in US Treasury 12 Month Bill ETF (OBIL) and US Treasury 3 Month Bill ETF (TBIL). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OBIL achieves a 1.17% return, which is significantly lower than TBIL's 1.49% return.

OBIL

• 1D: 0.00%
• 1M: 0.27%
• YTD: 1.17%
• 6M: 1.51%
• 1Y: 3.83%
• 3Y*: 4.55%
• 5Y*: —
• 10Y*: —

TBIL

• 1D: 0.00%
• 1M: 0.30%
• YTD: 1.49%
• 6M: 1.78%
• 1Y: 3.93%
• 3Y*: 4.64%
• 5Y*: —
• 10Y*: —

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

OBIL vs. TBIL - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
OBIL US Treasury 12 Month Bill ETF	1.17%	4.19%	4.94%	4.69%	0.53%
TBIL US Treasury 3 Month Bill ETF	1.49%	4.19%	5.15%	5.12%	0.55%

Correlation

The correlation between OBIL and TBIL is 0.36, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.36
Correlation (3Y) Calculated over the trailing 3-year period	0.33
Correlation (All Time) Calculated using the full available price history since Nov 16, 2022	0.32

Return for Risk

OBIL vs. TBIL — Risk / Return Rank

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

OBIL

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

TBIL

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

OBIL vs. TBIL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for US Treasury 12 Month Bill ETF (OBIL) and US Treasury 3 Month Bill ETF (TBIL). 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.

	OBIL	TBIL	Difference
Sharpe ratio Return per unit of total volatility	7.07	13.78	-6.71
Sortino ratio Return per unit of downside risk	16.19	58.40	-42.21
Omega ratio Gain probability vs. loss probability	3.70	17.16	-13.46
Calmar ratio Return relative to maximum drawdown	27.56	196.84	-169.28
Martin ratio Return relative to average drawdown	150.40	934.41	-784.01
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OBIL vs. TBIL - Sharpe Ratio Comparison

The current OBIL Sharpe Ratio is 7.07, which is lower than the TBIL Sharpe Ratio of 13.78. The chart below compares the historical Sharpe Ratios of OBIL and TBIL, 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

	OBIL	TBIL	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	7.07	13.78	-6.71
Sharpe Ratio (All Time) Calculated using the full available price history	5.38	14.07	-8.69

Drawdowns

OBIL vs. TBIL - Drawdown Comparison

The maximum OBIL drawdown since its inception was -0.33%, which is greater than TBIL's maximum drawdown of -0.10%. Use the drawdown chart below to compare losses from any high point for OBIL and TBIL.

Drawdown Indicators

	OBIL	TBIL	Difference
Max Drawdown Largest peak-to-trough decline	-0.33%	-0.10%	-0.23%
Max Drawdown (1Y) Largest decline over 1 year	-0.14%	-0.02%	-0.12%
Max Drawdown (3Y) Largest decline over 3 years	-0.21%	-0.02%	-0.19%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.03%	-0.00%	-0.03%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.03%	0.00%	+0.03%

Volatility

OBIL vs. TBIL - Volatility Comparison

US Treasury 12 Month Bill ETF (OBIL) has a higher volatility of 0.10% compared to US Treasury 3 Month Bill ETF (TBIL) at 0.08%. This indicates that OBIL's price experiences larger fluctuations and is considered to be riskier than TBIL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OBIL	TBIL	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.10%	0.08%	+0.02%
Volatility (6M) Calculated over the trailing 6-month period	0.33%	0.19%	+0.14%
Volatility (1Y) Calculated over the trailing 1-year period	0.54%	0.29%	+0.25%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.82%	0.32%	+0.50%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.82%	0.32%	+0.50%

OBIL vs. TBIL - Expense Ratio Comparison

Both OBIL and TBIL have an expense ratio of 0.15%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.

Dividends

OBIL vs. TBIL - Dividend Comparison

OBIL's dividend yield for the trailing twelve months is around 3.65%, less than TBIL's 3.82% yield.

Position	TTM	2025	2024	2023	2022
OBIL US Treasury 12 Month Bill ETF	3.65%	3.83%	4.56%	4.92%	0.52%
TBIL US Treasury 3 Month Bill ETF	3.82%	4.07%	5.02%	5.00%	1.10%

Frequently Asked Questions

Can I hold both OBIL and TBIL in my portfolio?

OBIL and TBIL have a correlation of 0.36, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OBIL or TBIL?

OBIL has higher volatility (0.10%) compared to TBIL (0.08%). In terms of maximum drawdown, OBIL dropped -0.33% vs TBIL's -0.10%.

Which ETF is better, OBIL or TBIL?

On 3-year performance, TBIL leads with 4.64% vs 4.55% for OBIL. Both ETFs have the same 0.15% expense ratio. 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, OBIL or TBIL?

Over the 3-year period, TBIL has performed better with a 4.64% return vs 4.55%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, OBIL or TBIL?

OBIL and TBIL have the same expense ratio: 0.15% per year.

Which ETF pays a higher dividend yield, OBIL or TBIL?

TBIL has the higher dividend yield at 3.82%, compared with 3.65% for OBIL.

What is the main difference between OBIL and TBIL?

OBIL is categorized as Government Bonds, while TBIL is Ultrashort Bond. OBIL tracks ICE BofA US 1-Year Treasury Bill Index - Benchmark TR Gross, while TBIL tracks ICE BofA US Treasury Bill 3 Month Index.

Which has better risk-adjusted returns?

TBIL currently has the higher Sharpe Ratio (13.78 vs 7.07), 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.