IBGA vs. CORB

Last updated Jun 24, 2026

IBGA (iShares iBonds Dec 2044 Term Treasury ETF) and CORB (AB Core Bond ETF) are both Intermediate Core Bond funds. IBGA is passively managed, while CORB is actively managed. Their correlation of 0.92 suggests significant overlap in exposure. IBGA charges 0.07%/yr vs 0.28%/yr for CORB.

Performance

IBGA vs. CORB - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares iBonds Dec 2044 Term Treasury ETF (IBGA) and AB Core Bond ETF (CORB). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, IBGA achieves a 0.45% return, which is significantly higher than CORB's 0.16% return.

IBGA

• 1D: 0.16%
• 1M: 1.86%
• YTD: 0.45%
• 6M: 0.38%
• 1Y: 4.16%
• 3Y*: —
• 5Y*: —
• 10Y*: —

CORB

• 1D: 0.10%
• 1M: 0.67%
• YTD: 0.16%
• 6M: 0.29%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

IBGA vs. CORB - Yearly Performance Comparison

	2026 (YTD)	2025
IBGA iShares iBonds Dec 2044 Term Treasury ETF	0.45%	-1.01%
CORB AB Core Bond ETF	0.16%	0.41%

Correlation

The correlation between IBGA and CORB is 0.92, 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	0.92

Return for Risk

IBGA vs. CORB — Risk / Return Rank

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

IBGA

IBGA Risk / Return Rank: 16
IBGA Sharpe Ratio Rank: 17
IBGA Sortino Ratio Rank: 16
IBGA Omega Ratio Rank: 15
IBGA Calmar Ratio Rank: 17
IBGA Martin Ratio Rank: 17

CORB

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

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.

IBGA vs. CORB - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares iBonds Dec 2044 Term Treasury ETF (IBGA) and AB Core Bond ETF (CORB). 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.

	IBGA	CORB	Difference
Sharpe ratio: Return per unit of total volatility	0.52	—	—
Sortino ratio: Return per unit of downside risk	0.80	—	—
Omega ratio: Gain probability vs. loss probability	1.09	—	—
Calmar ratio: Return relative to maximum drawdown	0.63	—	—
Martin ratio: Return relative to average drawdown	1.64	—	—

Drawdowns

IBGA vs. CORB - Drawdown Comparison

The maximum IBGA drawdown since its inception was -11.69%, which is greater than CORB's maximum drawdown of -3.08%. Use the drawdown chart below to compare losses from any high point for IBGA and CORB.

Drawdown Indicators

	IBGA	CORB	Difference
Max Drawdown Largest peak-to-trough decline	-11.69%	-3.08%	-8.61%
Max Drawdown (1Y) Largest decline over 1 year	-6.60%	—	—
Current Drawdown Current decline from peak	-3.88%	-1.63%	-2.25%
Average Drawdown Average peak-to-trough decline	-5.02%	-1.04%	-3.98%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.54%	—	—

Volatility

Volatility by Period

	IBGA	CORB	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.97%	—	—
Volatility (6M) Calculated over the trailing 6-month period	5.80%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	8.00%	4.04%	+3.96%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	9.82%	4.04%	+5.78%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	9.82%	4.04%	+5.78%

IBGA vs. CORB - Expense Ratio Comparison

IBGA has a 0.07% expense ratio, which is lower than CORB's 0.28% expense ratio.

Dividends

IBGA vs. CORB - Dividend Comparison

IBGA's dividend yield for the trailing twelve months is around 4.62%, more than CORB's 2.40% yield.

Position	TTM	2025	2024
CORB AB Core Bond ETF	2.40%	0.81%	0.00%
IBGA iShares iBonds Dec 2044 Term Treasury ETF	4.62%	4.49%	2.03%

Frequently Asked Questions

Can I hold both IBGA and CORB in my portfolio?

With a correlation of 0.92, IBGA and CORB 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, IBGA or CORB?

On fees, IBGA 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, IBGA or CORB?

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

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

IBGA has the higher dividend yield at 4.62%, compared with 2.40% for CORB.

What is the main difference between IBGA and CORB?

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