IBTG vs. WEEK
IBTG (iShares iBonds Dec 2026 Term Treasury ETF) and WEEK (Roundhill Weekly T-Bill ETF) are both exchange-traded funds - IBTG is a Government Bonds fund tracking the ICE 2026 Maturity US Treasury Index, while WEEK is a Ultrashort Bond fund actively managed by Roundhill. IBTG is passively managed, while WEEK is actively managed. Over the past year, IBTG returned 3.96% vs 3.72% for WEEK. At a correlation of -0.03, they often move in opposite directions. IBTG charges 0.07%/yr vs 0.19%/yr for WEEK.
Performance
IBTG vs. WEEK - Performance Comparison
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Returns By Period
The year-to-date returns for both stocks are quite close, with IBTG having a 1.62% return and WEEK slightly lower at 1.56%.
IBTG
- 1D
- 0.02%
- 1M
- 0.23%
- YTD
- 1.62%
- 6M
- 1.66%
- 1Y
- 3.96%
- 3Y*
- 4.28%
- 5Y*
- 0.91%
- 10Y*
- —
WEEK
- 1D
- -0.09%
- 1M
- 0.24%
- YTD
- 1.56%
- 6M
- 1.70%
- 1Y
- 3.72%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
IBTG vs. WEEK - Yearly Performance Comparison
| 2026 (YTD) | 2025 | |
|---|---|---|
IBTG iShares iBonds Dec 2026 Term Treasury ETF | 1.62% | 3.54% |
WEEK Roundhill Weekly T-Bill ETF | 1.56% | 3.37% |
Correlation
The correlation between IBTG and WEEK is -0.07, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | -0.07 |
Correlation (All Time) Calculated using the full available price history since Mar 6, 2025 | -0.03 |
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Return for Risk
IBTG vs. WEEK — Risk / Return Rank
IBTG
WEEK
IBTG vs. WEEK - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares iBonds Dec 2026 Term Treasury ETF (IBTG) and Roundhill Weekly T-Bill ETF (WEEK). 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.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| IBTG | WEEK | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.63 | ||
| Sortino ratioReturn per unit of downside risk | +2.88 | ||
| Omega ratioGain probability vs. loss probability | 4.25 | 4.07 | +0.18 |
| Calmar ratioReturn relative to maximum drawdown | 60.79 | 28.78 | +32.01 |
| Martin ratioReturn relative to average drawdown | 246.24 | 233.16 | +13.08 |
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Drawdowns
IBTG vs. WEEK - Drawdown Comparison
The maximum IBTG drawdown since its inception was -13.62%, which is greater than WEEK's maximum drawdown of -0.13%. Use the drawdown chart below to compare losses from any high point for IBTG and WEEK.
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Drawdown Indicators
| IBTG | WEEK | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -13.62% | -0.13% | -13.49% |
Max Drawdown (1Y)Largest decline over 1 year | -0.07% | -0.13% | +0.06% |
Max Drawdown (3Y)Largest decline over 3 years | -1.11% | — | — |
Max Drawdown (5Y)Largest decline over 5 years | -12.31% | — | — |
Current DrawdownCurrent decline from peak | 0.00% | -0.09% | +0.09% |
Average DrawdownAverage peak-to-trough decline | -4.85% | -0.01% | -4.84% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.02% | 0.02% | 0.00% |
Volatility
IBTG vs. WEEK - Volatility Comparison
The current volatility for iShares iBonds Dec 2026 Term Treasury ETF (IBTG) is 0.12%, while Roundhill Weekly T-Bill ETF (WEEK) has a volatility of 0.16%. This indicates that IBTG experiences smaller price fluctuations and is considered to be less risky than WEEK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| IBTG | WEEK | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.12% | 0.16% | -0.04% |
Volatility (6M)Calculated over the trailing 6-month period | 0.30% | 0.29% | +0.01% |
Volatility (1Y)Calculated over the trailing 1-year period | 0.50% | 0.44% | +0.06% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 3.25% | 0.40% | +2.85% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 3.44% | 0.40% | +3.04% |
IBTG vs. WEEK - Expense Ratio Comparison
IBTG has a 0.07% expense ratio, which is lower than WEEK's 0.19% 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
IBTG vs. WEEK - Dividend Comparison
IBTG's dividend yield for the trailing twelve months is around 3.95%, more than WEEK's 3.70% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 |
|---|---|---|---|---|---|---|---|
IBTG iShares iBonds Dec 2026 Term Treasury ETF | 3.95% | 4.03% | 4.08% | 3.61% | 2.06% | 0.66% | 0.53% |
WEEK Roundhill Weekly T-Bill ETF | 3.70% | 3.27% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
IBTG and WEEK have a correlation of -0.07, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
WEEK has higher volatility (0.16%) compared to IBTG (0.12%). In terms of maximum drawdown, IBTG dropped -13.62% vs WEEK's -0.13%.
On 1-year performance, IBTG leads with 3.96% vs 3.72% for WEEK. On fees, IBTG is cheaper at 0.07% per year. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 1-year period, IBTG has performed better with a 3.96% return vs 3.72%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
IBTG is cheaper with a 0.07% expense ratio, compared with 0.19% for WEEK.
IBTG has the higher dividend yield at 3.95%, compared with 3.70% for WEEK.
IBTG is categorized as Government Bonds, while WEEK is Ultrashort Bond. They also come from different issuers: iShares and Roundhill. Their fees differ too: 0.07% for IBTG and 0.19% for WEEK.
WEEK currently has the higher Sharpe Ratio (8.53 vs 7.90), 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.
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