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. Their correlation of 0.94 suggests significant overlap in exposure. 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 0.06% return, which is significantly higher than IBTO's -0.53% return.
CORB
- 1D
- -0.24%
- 1M
- 0.56%
- YTD
- 0.06%
- 6M
- 0.12%
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
IBTO
- 1D
- 0.10%
- 1M
- 0.47%
- YTD
- -0.53%
- 6M
- -0.45%
- 1Y
- 2.97%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
CORB vs. IBTO - Yearly Performance Comparison
| 2026 (YTD) | 2025 | |
|---|---|---|
CORB AB Core Bond ETF | 0.06% | 0.41% |
IBTO iShares iBonds Dec 2033 Term Treasury ETF | -0.53% | 0.13% |
Correlation
The correlation between CORB and IBTO is 0.94, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.
| Correlation | |
|---|---|
Correlation (All Time) Calculated using the full available price history since Nov 10, 2025 | 0.94 |
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Return for Risk
CORB vs. IBTO — Risk / Return Rank
CORB
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
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.
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.
| CORB | IBTO | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | — | 1.12 | — |
| Calmar ratioReturn relative to maximum drawdown | — | 0.82 | — |
| Martin ratioReturn relative to average drawdown | — | 2.14 | — |
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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 | -1.73% | -2.59% | +0.86% |
Average DrawdownAverage peak-to-trough decline | -1.04% | -2.37% | +1.33% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 1.39% | — |
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 | — | 1.27% | — |
Volatility (6M)Calculated over the trailing 6-month period | — | 3.14% | — |
Volatility (1Y)Calculated over the trailing 1-year period | 4.05% | 4.39% | -0.34% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 4.05% | 6.59% | -2.54% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.05% | 6.59% | -2.54% |
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 2.41%, less than IBTO's 4.15% yield.
| Position | TTM | 2025 | 2024 | 2023 |
|---|---|---|---|---|
CORB AB Core Bond ETF | 2.41% | 0.81% | 0.00% | 0.00% |
IBTO iShares iBonds Dec 2033 Term Treasury ETF | 4.15% | 4.05% | 4.23% | 1.66% |
Frequently Asked Questions
With a correlation of 0.94, 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 4.15%, compared with 2.41% 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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