IBTO vs. BFIX

Last updated Jun 4, 2026

IBTO (iShares iBonds Dec 2033 Term Treasury ETF) and BFIX (Build Bond Innovation ETF) are both Intermediate Core Bond funds. IBTO is passively managed, while BFIX is actively managed. Over the past year, IBTO returned 4.04% vs 4.80% for BFIX. At a 0.42 correlation, their price movements are largely independent. IBTO charges 0.07%/yr vs 0.45%/yr for BFIX.

Performance

IBTO vs. BFIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares iBonds Dec 2033 Term Treasury ETF (IBTO) 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, IBTO achieves a -0.58% return, which is significantly lower than BFIX's 1.27% return.

IBTO

• 1D: -0.21%
• 1M: -0.17%
• YTD: -0.58%
• 6M: -1.02%
• 1Y: 4.04%
• 3Y*: —
• 5Y*: —
• 10Y*: —

BFIX

• 1D: -0.08%
• 1M: 0.15%
• YTD: 1.27%
• 6M: 1.32%
• 1Y: 4.80%
• 3Y*: 7.75%
• 5Y*: —
• 10Y*: —

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

IBTO vs. BFIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
IBTO iShares iBonds Dec 2033 Term Treasury ETF	-0.58%	8.23%	-0.87%	1.71%
BFIX Build Bond Innovation ETF	1.27%	5.91%	12.95%	2.94%

Correlation

The correlation between IBTO and BFIX is 0.37, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.37
Correlation (All Time) Calculated using the full available price history since Jun 30, 2023	0.42

Return for Risk

IBTO vs. BFIX — Risk / Return Rank

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

IBTO

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

BFIX

BFIX Risk / Return Rank: 61
BFIX Sharpe Ratio Rank: 48
BFIX Sortino Ratio Rank: 53
BFIX Omega Ratio Rank: 51
BFIX Calmar Ratio Rank: 88
BFIX Martin Ratio Rank: 67

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.

IBTO vs. BFIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares iBonds Dec 2033 Term Treasury ETF (IBTO) 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.

	IBTO	BFIX	Difference
Sharpe ratio: Return per unit of total volatility	0.91	1.67	-0.76
Sortino ratio: Return per unit of downside risk	1.38	2.55	-1.17
Omega ratio: Gain probability vs. loss probability	1.16	1.32	-0.16
Calmar ratio: Return relative to maximum drawdown	1.11	5.11	-4.00
Martin ratio: Return relative to average drawdown	3.21	12.39	-9.18
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IBTO vs. BFIX - Sharpe Ratio Comparison

The current IBTO Sharpe Ratio is 0.91, which is lower than the BFIX Sharpe Ratio of 1.67. The chart below compares the historical Sharpe Ratios of IBTO and BFIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	IBTO	BFIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.91	1.67	-0.76
Sharpe Ratio (All Time) Calculated using the full available price history	0.43	0.85	-0.42

Drawdowns

IBTO vs. BFIX - Drawdown Comparison

The maximum IBTO drawdown since its inception was -8.36%, roughly equal to the maximum BFIX drawdown of -8.03%. Use the drawdown chart below to compare losses from any high point for IBTO and BFIX.

Drawdown Indicators

	IBTO	BFIX	Difference
Max Drawdown Largest peak-to-trough decline	-8.36%	-8.03%	-0.33%
Max Drawdown (1Y) Largest decline over 1 year	-3.66%	-0.94%	-2.72%
Max Drawdown (3Y) Largest decline over 3 years	—	-4.05%	—
Current Drawdown Current decline from peak	-2.63%	-0.40%	-2.23%
Average Drawdown Average peak-to-trough decline	-2.37%	-2.76%	+0.39%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.26%	0.39%	+0.87%

Volatility

IBTO vs. BFIX - Volatility Comparison

iShares iBonds Dec 2033 Term Treasury ETF (IBTO) has a higher volatility of 1.32% compared to Build Bond Innovation ETF (BFIX) at 0.89%. This indicates that IBTO's price experiences larger fluctuations and is considered to be riskier than BFIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IBTO	BFIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.32%	0.89%	+0.43%
Volatility (6M) Calculated over the trailing 6-month period	3.02%	1.73%	+1.29%
Volatility (1Y) Calculated over the trailing 1-year period	4.46%	2.90%	+1.56%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.61%	4.77%	+1.84%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.61%	4.77%	+1.84%

IBTO vs. BFIX - Expense Ratio Comparison

IBTO has a 0.07% expense ratio, which is lower than BFIX's 0.45% expense ratio.

Dividends

IBTO vs. BFIX - Dividend Comparison

IBTO's dividend yield for the trailing twelve months is around 4.15%, more than BFIX's 3.52% yield.

Position	TTM	2025	2024	2023	2022
BFIX Build Bond Innovation ETF	3.52%	3.73%	4.38%	4.30%	1.58%
IBTO iShares iBonds Dec 2033 Term Treasury ETF	4.15%	4.05%	4.23%	1.66%	0.00%

Frequently Asked Questions

Can I hold both IBTO and BFIX in my portfolio?

IBTO and BFIX have a correlation of 0.37, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IBTO or BFIX?

IBTO has higher volatility (1.32%) compared to BFIX (0.89%). In terms of maximum drawdown, IBTO dropped -8.36% vs BFIX's -8.03%.

Which ETF is better, IBTO or BFIX?

On 1-year performance, BFIX leads with 4.80% vs 4.04% for IBTO. On fees, IBTO is cheaper at 0.07% per year. On volatility, BFIX has been the lower-risk option at 0.89%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, IBTO or BFIX?

Over the 1-year period, BFIX has performed better with a 4.80% return vs 4.04%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, IBTO or BFIX?

IBTO is cheaper with a 0.07% expense ratio, compared with 0.45% for BFIX.

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

IBTO has the higher dividend yield at 4.15%, compared with 3.52% for BFIX.

What is the main difference between IBTO and BFIX?

They also come from different issuers: iShares and Build. Their fees differ too: 0.07% for IBTO and 0.45% for BFIX.

Which has better risk-adjusted returns?

BFIX currently has the higher Sharpe Ratio (1.67 vs 0.91), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.