CORB vs. IBTM

Last updated Jun 3, 2026

CORB (AB Core Bond ETF) and IBTM (iShares iBonds Dec 2032 Term Treasury ETF) are both Intermediate Core Bond funds. CORB is actively managed, while IBTM is passively managed. Their correlation of 0.94 suggests significant overlap in exposure. CORB charges 0.28%/yr vs 0.07%/yr for IBTM.

Performance

CORB vs. IBTM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AB Core Bond ETF (CORB) and iShares iBonds Dec 2032 Term Treasury ETF (IBTM). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CORB achieves a 0.12% return, which is significantly higher than IBTM's -0.32% return.

CORB

• 1D: 0.03%
• 1M: -0.05%
• YTD: 0.12%
• 6M: 0.19%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

IBTM

• 1D: 0.04%
• 1M: -0.24%
• YTD: -0.32%
• 6M: -0.47%
• 1Y: 4.02%
• 3Y*: 2.74%
• 5Y*: —
• 10Y*: —

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

CORB vs. IBTM - Yearly Performance Comparison

	2026 (YTD)	2025
CORB AB Core Bond ETF	0.12%	0.21%
IBTM iShares iBonds Dec 2032 Term Treasury ETF	-0.32%	0.38%

Correlation

The correlation between CORB and IBTM 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 11, 2025	0.94

Return for Risk

CORB vs. IBTM — Risk / Return Rank

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

IBTM

IBTM Risk / Return Rank: 26
IBTM Sharpe Ratio Rank: 27
IBTM Sortino Ratio Rank: 27
IBTM Omega Ratio Rank: 25
IBTM Calmar Ratio Rank: 24
IBTM Martin Ratio Rank: 25

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.

CORB vs. IBTM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AB Core Bond ETF (CORB) and iShares iBonds Dec 2032 Term Treasury ETF (IBTM). 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.

Sharpe Ratios by Period

	CORB	IBTM	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	0.99	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.16	0.21	-0.05

Drawdowns

CORB vs. IBTM - Drawdown Comparison

The maximum CORB drawdown since its inception was -3.08%, smaller than the maximum IBTM drawdown of -13.60%. Use the drawdown chart below to compare losses from any high point for CORB and IBTM.

Drawdown Indicators

	CORB	IBTM	Difference
Max Drawdown Largest peak-to-trough decline	-3.08%	-13.60%	+10.52%
Max Drawdown (1Y) Largest decline over 1 year	—	-3.26%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-7.86%	—
Current Drawdown Current decline from peak	-1.67%	-2.21%	+0.54%
Average Drawdown Average peak-to-trough decline	-0.98%	-4.82%	+3.84%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	1.11%	—

Volatility

Volatility by Period

	CORB	IBTM	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	1.22%	—
Volatility (6M) Calculated over the trailing 6-month period	—	2.77%	—
Volatility (1Y) Calculated over the trailing 1-year period	3.96%	4.10%	-0.14%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.96%	7.56%	-3.60%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.96%	7.56%	-3.60%

CORB vs. IBTM - Expense Ratio Comparison

CORB has a 0.28% expense ratio, which is higher than IBTM's 0.07% expense ratio.

Dividends

CORB vs. IBTM - Dividend Comparison

CORB's dividend yield for the trailing twelve months is around 2.40%, less than IBTM's 3.94% yield.

Position	TTM	2025	2024	2023	2022
CORB AB Core Bond ETF	2.40%	0.81%	0.00%	0.00%	0.00%
IBTM iShares iBonds Dec 2032 Term Treasury ETF	3.94%	3.87%	3.96%	3.39%	1.38%

Frequently Asked Questions

Can I hold both CORB and IBTM in my portfolio?

With a correlation of 0.94, CORB and IBTM 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.

Which ETF is better, CORB or IBTM?

On fees, IBTM is cheaper at 0.07% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, CORB or IBTM?

IBTM is cheaper with a 0.07% expense ratio, compared with 0.28% for CORB.

Which ETF pays a higher dividend yield, CORB or IBTM?

IBTM has the higher dividend yield at 3.94%, compared with 2.40% for CORB.

What is the main difference between CORB and IBTM?

They also come from different issuers: AllianceBernstein and iShares. Their fees differ too: 0.28% for CORB and 0.07% for IBTM.