OPER vs. TBLL

Last updated Jun 4, 2026

OPER (ClearShares Ultra-Short Maturity ETF) and TBLL (Invesco Short Term Treasury ETF) are both Ultrashort Bond funds - OPER tracks the ICE BofA U.S. Broad Market Index while TBLL tracks the ICE U.S. Treasury Short Bond Index. Both are passively managed. Over the past 5 years, OPER returned 3.65%/yr vs 3.35%/yr for TBLL. At a 0.27 correlation, their price movements are largely independent. OPER charges 0.20%/yr vs 0.08%/yr for TBLL.

Performance

OPER vs. TBLL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ClearShares Ultra-Short Maturity ETF (OPER) and Invesco Short Term Treasury ETF (TBLL). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OPER achieves a 1.55% return, which is significantly higher than TBLL's 1.43% return.

OPER

• 1D: 0.01%
• 1M: 0.34%
• YTD: 1.55%
• 6M: 1.88%
• 1Y: 4.07%
• 3Y*: 4.80%
• 5Y*: 3.65%
• 10Y*: —

TBLL

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

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

OPER vs. TBLL - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
OPER ClearShares Ultra-Short Maturity ETF	1.55%	4.37%	5.34%	5.09%	1.76%	0.37%	0.65%	2.15%	0.90%
TBLL Invesco Short Term Treasury ETF	1.43%	4.21%	5.11%	5.01%	1.11%	-0.01%	0.93%	2.20%	0.97%

Correlation

The correlation between OPER and TBLL is 0.37, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.37
Correlation (3Y) Calculated over the trailing 3-year period	0.29
Correlation (5Y) Calculated over the trailing 5-year period	0.32
Correlation (All Time) Calculated using the full available price history since Jul 12, 2018	0.27

The correlation between OPER and TBLL shifts across timeframes, from 0.27 (all time) to 0.37 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

OPER vs. TBLL — Risk / Return Rank

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

OPER

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

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

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.

OPER vs. TBLL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ClearShares Ultra-Short Maturity ETF (OPER) and Invesco Short Term Treasury ETF (TBLL). 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.

	OPER	TBLL	Difference
Sharpe ratio: Return per unit of total volatility	15.45	20.94	-5.49
Sortino ratio: Return per unit of downside risk	43.90	218.31	-174.41
Omega ratio: Gain probability vs. loss probability	13.38	102.92	-89.54
Calmar ratio: Return relative to maximum drawdown	61.29	416.84	-355.56
Martin ratio: Return relative to average drawdown	519.55	3,533.11	-3,013.57
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OPER vs. TBLL - Sharpe Ratio Comparison

The current OPER Sharpe Ratio is 15.45, which is comparable to the TBLL Sharpe Ratio of 20.94. The chart below compares the historical Sharpe Ratios of OPER and TBLL, 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

	OPER	TBLL	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	15.45	20.94	-5.49
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	11.47	7.53	+3.94
Sharpe Ratio (All Time) Calculated using the full available price history	2.28	4.26	-1.98

Drawdowns

OPER vs. TBLL - Drawdown Comparison

The maximum OPER drawdown since its inception was -2.33%, which is greater than TBLL's maximum drawdown of -0.63%. Use the drawdown chart below to compare losses from any high point for OPER and TBLL.

Drawdown Indicators

	OPER	TBLL	Difference
Max Drawdown Largest peak-to-trough decline	-2.33%	-0.63%	-1.70%
Max Drawdown (1Y) Largest decline over 1 year	-0.07%	-0.01%	-0.06%
Max Drawdown (3Y) Largest decline over 3 years	-0.11%	-0.36%	+0.25%
Max Drawdown (5Y) Largest decline over 5 years	-0.13%	-0.36%	+0.23%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.16%	-0.14%	-0.02%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.01%	0.00%	+0.01%

Volatility

OPER vs. TBLL - Volatility Comparison

ClearShares Ultra-Short Maturity ETF (OPER) has a higher volatility of 0.10% compared to Invesco Short Term Treasury ETF (TBLL) at 0.05%. This indicates that OPER's price experiences larger fluctuations and is considered to be riskier than TBLL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OPER	TBLL	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.10%	0.05%	+0.05%
Volatility (6M) Calculated over the trailing 6-month period	0.20%	0.12%	+0.08%
Volatility (1Y) Calculated over the trailing 1-year period	0.26%	0.19%	+0.07%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.32%	0.45%	-0.13%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.23%	0.56%	+0.67%

OPER vs. TBLL - Expense Ratio Comparison

OPER has a 0.20% expense ratio, which is higher than TBLL's 0.08% 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%.

Dividends

OPER vs. TBLL - Dividend Comparison

OPER's dividend yield for the trailing twelve months is around 4.09%, more than TBLL's 3.81% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
OPER ClearShares Ultra-Short Maturity ETF	4.09%	4.32%	5.21%	5.03%	1.71%	0.36%	0.64%	2.08%	0.89%	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 OPER and TBLL in my portfolio?

OPER and TBLL have a correlation of 0.37, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OPER or TBLL?

OPER has higher volatility (0.10%) compared to TBLL (0.05%). In terms of maximum drawdown, OPER dropped -2.33% vs TBLL's -0.63%.

Which ETF is better, OPER or TBLL?

On 5-year performance, OPER leads with 3.65% vs 3.35% for TBLL. 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, OPER or TBLL?

Over the 5-year period, OPER has performed better with a 3.65% return vs 3.35%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, OPER or TBLL?

TBLL is cheaper with a 0.08% expense ratio, compared with 0.20% for OPER.

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

OPER has the higher dividend yield at 4.09%, compared with 3.81% for TBLL.

What is the main difference between OPER and TBLL?

OPER tracks ICE BofA U.S. Broad Market Index, while TBLL tracks ICE U.S. Treasury Short Bond Index. They also come from different issuers: ClearShares and Invesco. Their fees differ too: 0.20% for OPER and 0.08% for TBLL.

Which has better risk-adjusted returns?

TBLL currently has the higher Sharpe Ratio (20.94 vs 15.45), 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.