CORB vs. IBTO
CORB (AB Core Bond ETF) and IBTO (iShares iBonds Dec 2033 Term Treasury ETF) are both Intermediate Core Bond funds. CORB is actively managed, while IBTO is passively managed. With a 0.95 correlation, they move nearly in lockstep. CORB charges 0.28%/yr vs 0.07%/yr for IBTO.
Performance
CORB vs. IBTO - Performance Comparison
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Returns By Period
In the year-to-date period, CORB achieves a 0.12% return, which is significantly higher than IBTO's -0.37% return.
CORB
- 1D
- 0.03%
- 1M
- -0.05%
- YTD
- 0.12%
- 6M
- 0.19%
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
IBTO
- 1D
- 0.04%
- 1M
- -0.23%
- YTD
- -0.37%
- 6M
- -0.63%
- 1Y
- 4.17%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
CORB vs. IBTO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | |
|---|---|---|
CORB AB Core Bond ETF | 0.12% | 0.21% |
IBTO iShares iBonds Dec 2033 Term Treasury ETF | -0.37% | 0.28% |
Correlation
The correlation between CORB and IBTO is 0.95 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since Nov 11, 2025 | 0.95 |
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Return for Risk
CORB vs. IBTO — Risk / Return Rank
CORB
IBTO
CORB vs. IBTO - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for AB Core Bond ETF (CORB) and iShares iBonds Dec 2033 Term Treasury ETF (IBTO). 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.
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
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Sharpe Ratios by Period
| CORB | IBTO | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | — | 0.94 | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.16 | 0.44 | -0.29 |
Drawdowns
CORB vs. IBTO - Drawdown Comparison
The maximum CORB drawdown since its inception was -3.08%, smaller than the maximum IBTO drawdown of -8.36%. Use the drawdown chart below to compare losses from any high point for CORB and IBTO.
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Drawdown Indicators
| CORB | IBTO | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -3.08% | -8.36% | +5.28% |
Max Drawdown (1Y)Largest decline over 1 year | — | -3.66% | — |
Current DrawdownCurrent decline from peak | -1.67% | -2.43% | +0.76% |
Average DrawdownAverage peak-to-trough decline | -0.98% | -2.37% | +1.39% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 1.25% | — |
Volatility
CORB vs. IBTO - Volatility Comparison
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Volatility by Period
| CORB | IBTO | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | — | 1.33% | — |
Volatility (6M)Calculated over the trailing 6-month period | — | 3.04% | — |
Volatility (1Y)Calculated over the trailing 1-year period | 3.96% | 4.47% | -0.51% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 3.96% | 6.62% | -2.66% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 3.96% | 6.62% | -2.66% |
CORB vs. IBTO - Expense Ratio Comparison
CORB has a 0.28% expense ratio, which is higher than IBTO's 0.07% expense ratio.
Dividends
CORB vs. IBTO - Dividend Comparison
CORB's dividend yield for the trailing twelve months is around 2.40%, less than IBTO's 4.14% yield.
| Position | TTM | 2025 | 2024 | 2023 |
|---|---|---|---|---|
CORB AB Core Bond ETF | 2.40% | 0.81% | 0.00% | 0.00% |
IBTO iShares iBonds Dec 2033 Term Treasury ETF | 4.14% | 4.05% | 4.23% | 1.66% |
Frequently Asked Questions
With a correlation of 0.95, CORB and IBTO move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
On fees, IBTO is cheaper at 0.07% per year. The better choice depends on whether you care most about return, fees, risk, or income.
IBTO is cheaper with a 0.07% expense ratio, compared with 0.28% for CORB.
IBTO has the higher dividend yield at 4.14%, compared with 2.40% for CORB.
They also come from different issuers: AllianceBernstein and iShares. Their fees differ too: 0.28% for CORB and 0.07% for IBTO.
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