OBIL vs. SMBS

Last updated Apr 2, 2026

Compare and contrast key facts about US Treasury 12 Month Bill ETF (OBIL) and Schwab Mortgage-Backed Securities ETF (SMBS).

OBIL and SMBS are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. OBIL is a passively managed fund by US Benchmark Series that tracks the performance of the ICE BofA US 1-Year Treasury Bill Index - Benchmark TR Gross. It was launched on Nov 14, 2022. SMBS is a passively managed fund by Charles Schwab that tracks the performance of the Bloomberg US MBS Float Adjusted Total Return Index. It was launched on Nov 18, 2024. Both OBIL and SMBS 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

OBIL vs. SMBS - Performance Comparison

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

OBIL vs. SMBS - Yearly Performance Comparison

	2026 (YTD)	2025	2024
OBIL US Treasury 12 Month Bill ETF	0.63%	4.19%	0.72%
SMBS Schwab Mortgage-Backed Securities ETF	0.47%	8.15%	-0.07%

Returns By Period

In the year-to-date period, OBIL achieves a 0.63% return, which is significantly higher than SMBS's 0.47% return.

OBIL

• 1D: 0.00%
• 1M: 0.15%
• YTD: 0.63%
• 6M: 1.56%
• 1Y: 3.80%
• 3Y*: 4.41%
• 5Y*: —
• 10Y*: —

SMBS

• 1D: 0.11%
• 1M: -1.15%
• YTD: 0.47%
• 6M: 1.88%
• 1Y: 5.07%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

OBIL vs. SMBS - Expense Ratio Comparison

OBIL has a 0.15% expense ratio, which is higher than SMBS's 0.03% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

OBIL

US Treasury 12 Month Bill ETF

SMBS

Schwab Mortgage-Backed Securities ETF

Return for Risk

OBIL vs. SMBS — 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

SMBS

SMBS Risk / Return Rank: 57
SMBS Sharpe Ratio Rank: 58
SMBS Sortino Ratio Rank: 57
SMBS Omega Ratio Rank: 47
SMBS Calmar Ratio Rank: 70
SMBS Martin Ratio Rank: 54

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. SMBS - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for US Treasury 12 Month Bill ETF (OBIL) and Schwab Mortgage-Backed Securities ETF (SMBS). 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	SMBS	Difference
Sharpe ratio Return per unit of total volatility	6.62	1.07	+5.55
Sortino ratio Return per unit of downside risk	14.13	1.54	+12.60
Omega ratio Gain probability vs. loss probability	3.32	1.19	+2.12
Calmar ratio Return relative to maximum drawdown	27.56	1.93	+25.64
Martin ratio Return relative to average drawdown	108.39	5.53	+102.86
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. SMBS - Sharpe Ratio Comparison

The current OBIL Sharpe Ratio is 6.62, which is higher than the SMBS Sharpe Ratio of 1.07. The chart below compares the historical Sharpe Ratios of OBIL and SMBS, 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

	OBIL	SMBS	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	6.62	1.07	+5.55
Sharpe Ratio (All Time) Calculated using the full available price history	5.35	1.28	+4.07

Correlation

The correlation between OBIL and SMBS is 0.49, which is considered to be moderate. This suggests that the two assets have some degree of positive relationship in their price movements. Moderate correlation can be acceptable for portfolio diversification, offering a balance between risk and potential returns.

Dividends

OBIL vs. SMBS - Dividend Comparison

OBIL's dividend yield for the trailing twelve months is around 3.70%, less than SMBS's 4.82% yield.

	TTM	2025	2024	2023	2022
OBIL US Treasury 12 Month Bill ETF	3.70%	3.83%	4.56%	4.92%	0.52%
SMBS Schwab Mortgage-Backed Securities ETF	4.82%	4.83%	0.50%	0.00%	0.00%

Drawdowns

OBIL vs. SMBS - Drawdown Comparison

The maximum OBIL drawdown since its inception was -0.33%, smaller than the maximum SMBS drawdown of -3.20%. Use the drawdown chart below to compare losses from any high point for OBIL and SMBS.

Drawdown Indicators

	OBIL	SMBS	Difference
Max Drawdown Largest peak-to-trough decline	-0.33%	-3.20%	+2.87%
Max Drawdown (1Y) Largest decline over 1 year	-0.14%	-2.83%	+2.69%
Current Drawdown Current decline from peak	0.00%	-1.56%	+1.56%
Average Drawdown Average peak-to-trough decline	-0.03%	-0.77%	+0.74%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.04%	0.99%	-0.95%

Volatility

OBIL vs. SMBS - Volatility Comparison

The current volatility for US Treasury 12 Month Bill ETF (OBIL) is 0.21%, while Schwab Mortgage-Backed Securities ETF (SMBS) has a volatility of 1.83%. This indicates that OBIL experiences smaller price fluctuations and is considered to be less risky than SMBS based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OBIL	SMBS	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.21%	1.83%	-1.62%
Volatility (6M) Calculated over the trailing 6-month period	0.35%	2.75%	-2.40%
Volatility (1Y) Calculated over the trailing 1-year period	0.58%	4.77%	-4.19%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.84%	4.91%	-4.07%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.84%	4.91%	-4.07%