CORB vs. BFIX

Last updated Jun 23, 2026

CORB (AB Core Bond ETF) and BFIX (Build Bond Innovation ETF) are both Intermediate Core Bond funds. Both are actively managed. At a 0.45 correlation, their price movements are largely independent. CORB charges 0.28%/yr vs 0.45%/yr for BFIX.

Performance

CORB vs. BFIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AB Core Bond ETF (CORB) and Build Bond Innovation ETF (BFIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CORB achieves a 0.06% return, which is significantly lower than BFIX's 0.79% return.

CORB

• 1D: -0.24%
• 1M: 0.56%
• YTD: 0.06%
• 6M: 0.12%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

BFIX

• 1D: -0.06%
• 1M: -0.33%
• YTD: 0.79%
• 6M: 0.46%
• 1Y: 3.99%
• 3Y*: 7.43%
• 5Y*: —
• 10Y*: —

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

CORB vs. BFIX - Yearly Performance Comparison

	2026 (YTD)	2025
CORB AB Core Bond ETF	0.06%	0.41%
BFIX Build Bond Innovation ETF	0.79%	0.35%

Correlation

The correlation between CORB and BFIX is 0.45, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (All Time) Calculated using the full available price history since Nov 10, 2025	0.45

Return for Risk

CORB vs. BFIX — Risk / Return Rank

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

CORB

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

BFIX

BFIX Risk / Return Rank: 53
BFIX Sharpe Ratio Rank: 41
BFIX Sortino Ratio Rank: 43
BFIX Omega Ratio Rank: 42
BFIX Calmar Ratio Rank: 83
BFIX Martin Ratio Rank: 57

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. BFIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AB Core Bond ETF (CORB) and Build Bond Innovation ETF (BFIX). 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	BFIX	Difference
Sharpe ratio: Return per unit of total volatility	—	1.40	—
Sortino ratio: Return per unit of downside risk	—	2.13	—
Omega ratio: Gain probability vs. loss probability	—	1.27	—
Calmar ratio: Return relative to maximum drawdown	—	4.25	—
Martin ratio: Return relative to average drawdown	—	9.60	—

Drawdowns

CORB vs. BFIX - Drawdown Comparison

The maximum CORB drawdown since its inception was -3.08%, smaller than the maximum BFIX drawdown of -8.54%. Use the drawdown chart below to compare losses from any high point for CORB and BFIX.

Drawdown Indicators

	CORB	BFIX	Difference
Max Drawdown Largest peak-to-trough decline	-3.08%	-8.54%	+5.46%
Max Drawdown (1Y) Largest decline over 1 year	—	-0.94%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-4.05%	—
Current Drawdown Current decline from peak	-1.73%	-0.87%	-0.86%
Average Drawdown Average peak-to-trough decline	-1.04%	-2.99%	+1.95%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.42%	—

Volatility

Volatility by Period

	CORB	BFIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.62%	—
Volatility (6M) Calculated over the trailing 6-month period	—	1.72%	—
Volatility (1Y) Calculated over the trailing 1-year period	4.05%	2.86%	+1.19%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.05%	4.76%	-0.71%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.05%	4.76%	-0.71%

CORB vs. BFIX - Expense Ratio Comparison

CORB has a 0.28% expense ratio, which is lower than BFIX's 0.45% expense ratio.

Dividends

CORB vs. BFIX - Dividend Comparison

CORB's dividend yield for the trailing twelve months is around 2.41%, less than BFIX's 3.54% yield.

Position	TTM	2025	2024	2023	2022
BFIX Build Bond Innovation ETF	3.54%	3.73%	4.38%	4.30%	1.58%
CORB AB Core Bond ETF	2.41%	0.81%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both CORB and BFIX in my portfolio?

CORB and BFIX have a correlation of 0.45, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, CORB or BFIX?

On fees, CORB is cheaper at 0.28% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, CORB or BFIX?

CORB is cheaper with a 0.28% expense ratio, compared with 0.45% for BFIX.

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

BFIX has the higher dividend yield at 3.54%, compared with 2.41% for CORB.

What is the main difference between CORB and BFIX?

They also come from different issuers: AllianceBernstein and Build. Their fees differ too: 0.28% for CORB and 0.45% for BFIX.