CORB vs. BIV
CORB (AB Core Bond ETF) and BIV (Vanguard Intermediate-Term Bond Index ETF) are both Intermediate Core Bond funds. CORB is actively managed, while BIV is passively managed. With a 0.95 correlation, they move nearly in lockstep. CORB charges 0.28%/yr vs 0.03%/yr for BIV.
Performance
CORB vs. BIV - Performance Comparison
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Returns By Period
In the year-to-date period, CORB achieves a 0.16% return, which is significantly higher than BIV's -0.13% return.
CORB
- 1D
- 0.10%
- 1M
- 0.67%
- YTD
- 0.16%
- 6M
- 0.29%
- 1Y
- —
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
BIV
- 1D
- 0.10%
- 1M
- 0.53%
- YTD
- -0.13%
- 6M
- 0.01%
- 1Y
- 3.84%
- 3Y*
- 4.38%
- 5Y*
- 0.22%
- 10Y*
- 1.83%
CORB vs. BIV - Yearly Performance Comparison
| 2026 (YTD) | 2025 | |
|---|---|---|
CORB AB Core Bond ETF | 0.16% | 0.41% |
BIV Vanguard Intermediate-Term Bond Index ETF | -0.13% | 0.46% |
Correlation
The correlation between CORB and BIV 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 10, 2025 | 0.95 |
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Return for Risk
CORB vs. BIV — Risk / Return Rank
CORB
Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.
BIV
CORB vs. BIV - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for AB Core Bond ETF (CORB) and Vanguard Intermediate-Term Bond Index ETF (BIV). 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 | BIV | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | — | — | |
| Sortino ratioReturn per unit of downside risk | — | — | |
| Omega ratioGain probability vs. loss probability | — | 1.17 | — |
| Calmar ratioReturn relative to maximum drawdown | — | 1.22 | — |
| Martin ratioReturn relative to average drawdown | — | 3.38 | — |
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Drawdowns
CORB vs. BIV - Drawdown Comparison
The maximum CORB drawdown since its inception was -3.08%, smaller than the maximum BIV drawdown of -18.95%. Use the drawdown chart below to compare losses from any high point for CORB and BIV.
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Drawdown Indicators
| CORB | BIV | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -3.08% | -18.95% | +15.87% |
Max Drawdown (1Y)Largest decline over 1 year | — | -3.18% | — |
Max Drawdown (3Y)Largest decline over 3 years | — | -6.07% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -18.74% | — |
Max Drawdown (10Y)Largest decline over 10 years | — | -18.95% | — |
Current DrawdownCurrent decline from peak | -1.63% | -1.93% | +0.30% |
Average DrawdownAverage peak-to-trough decline | -1.04% | -3.38% | +2.34% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | — | 1.14% | — |
Volatility
CORB vs. BIV - Volatility Comparison
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Volatility by Period
| CORB | BIV | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | — | 1.23% | — |
Volatility (6M)Calculated over the trailing 6-month period | — | 3.03% | — |
Volatility (1Y)Calculated over the trailing 1-year period | 4.04% | 4.04% | 0.00% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 4.04% | 6.40% | -2.36% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.04% | 5.50% | -1.46% |
CORB vs. BIV - Expense Ratio Comparison
CORB has a 0.28% expense ratio, which is higher than BIV's 0.03% expense ratio.
Dividends
CORB vs. BIV - Dividend Comparison
CORB's dividend yield for the trailing twelve months is around 2.40%, less than BIV's 4.21% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BIV Vanguard Intermediate-Term Bond Index ETF | 4.21% | 4.01% | 3.79% | 3.09% | 2.41% | 3.42% | 2.95% | 2.75% | 2.88% | 2.69% | 3.01% | 3.02% |
CORB AB Core Bond ETF | 2.40% | 0.81% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
With a correlation of 0.95, CORB and BIV 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, BIV is cheaper at 0.03% per year. The better choice depends on whether you care most about return, fees, risk, or income.
BIV is cheaper with a 0.03% expense ratio, compared with 0.28% for CORB.
BIV has the higher dividend yield at 4.21%, compared with 2.40% for CORB.
They also come from different issuers: AllianceBernstein and Vanguard. Their fees differ too: 0.28% for CORB and 0.03% for BIV.
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