IBTO vs. CAFX

Last updated Jun 4, 2026

IBTO (iShares iBonds Dec 2033 Term Treasury ETF) and CAFX (Congress Intermediate Bond ETF) are both Intermediate Core Bond funds. IBTO is passively managed, while CAFX is actively managed. Over the past year, IBTO returned 4.04% vs 3.95% for CAFX. Their correlation of 0.86 suggests significant overlap in exposure. IBTO charges 0.07%/yr vs 0.35%/yr for CAFX.

Performance

IBTO vs. CAFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares iBonds Dec 2033 Term Treasury ETF (IBTO) and Congress Intermediate Bond ETF (CAFX). 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 CAFX's 0.28% return.

IBTO

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

CAFX

• 1D: -0.14%
• 1M: 0.22%
• YTD: 0.28%
• 6M: 0.37%
• 1Y: 3.95%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

IBTO vs. CAFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024
IBTO iShares iBonds Dec 2033 Term Treasury ETF	-0.58%	8.23%	-5.37%
CAFX Congress Intermediate Bond ETF	0.28%	6.46%	-1.66%

Correlation

The correlation between IBTO and CAFX is 0.83, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.83
Correlation (All Time) Calculated using the full available price history since Sep 11, 2024	0.86

The correlation between IBTO and CAFX has been stable across timeframes, ranging from 0.83 to 0.86 - a consistent structural relationship.

Return for Risk

IBTO vs. CAFX — 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

CAFX

CAFX Risk / Return Rank: 42
CAFX Sharpe Ratio Rank: 39
CAFX Sortino Ratio Rank: 43
CAFX Omega Ratio Rank: 40
CAFX Calmar Ratio Rank: 46
CAFX Martin Ratio Rank: 41

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. CAFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares iBonds Dec 2033 Term Treasury ETF (IBTO) and Congress Intermediate Bond ETF (CAFX). 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	CAFX	Difference
Sharpe ratio: Return per unit of total volatility	0.91	1.37	-0.46
Sortino ratio: Return per unit of downside risk	1.38	2.12	-0.74
Omega ratio: Gain probability vs. loss probability	1.16	1.26	-0.10
Calmar ratio: Return relative to maximum drawdown	1.11	2.22	-1.11
Martin ratio: Return relative to average drawdown	3.21	6.46	-3.25
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. CAFX - Sharpe Ratio Comparison

The current IBTO Sharpe Ratio is 0.91, which is lower than the CAFX Sharpe Ratio of 1.37. The chart below compares the historical Sharpe Ratios of IBTO and CAFX, 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	CAFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.91	1.37	-0.46
Sharpe Ratio (All Time) Calculated using the full available price history	0.43	0.91	-0.48

Drawdowns

IBTO vs. CAFX - Drawdown Comparison

The maximum IBTO drawdown since its inception was -8.36%, which is greater than CAFX's maximum drawdown of -2.63%. Use the drawdown chart below to compare losses from any high point for IBTO and CAFX.

Drawdown Indicators

	IBTO	CAFX	Difference
Max Drawdown Largest peak-to-trough decline	-8.36%	-2.63%	-5.73%
Max Drawdown (1Y) Largest decline over 1 year	-3.66%	-1.79%	-1.87%
Current Drawdown Current decline from peak	-2.63%	-0.92%	-1.71%
Average Drawdown Average peak-to-trough decline	-2.37%	-0.73%	-1.64%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.26%	0.61%	+0.65%

Volatility

IBTO vs. CAFX - Volatility Comparison

iShares iBonds Dec 2033 Term Treasury ETF (IBTO) has a higher volatility of 1.32% compared to Congress Intermediate Bond ETF (CAFX) at 0.75%. This indicates that IBTO's price experiences larger fluctuations and is considered to be riskier than CAFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IBTO	CAFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.32%	0.75%	+0.57%
Volatility (6M) Calculated over the trailing 6-month period	3.02%	1.84%	+1.18%
Volatility (1Y) Calculated over the trailing 1-year period	4.46%	2.89%	+1.57%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.61%	3.16%	+3.45%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.61%	3.16%	+3.45%

IBTO vs. CAFX - Expense Ratio Comparison

IBTO has a 0.07% expense ratio, which is lower than CAFX's 0.35% expense ratio.

Dividends

IBTO vs. CAFX - Dividend Comparison

IBTO's dividend yield for the trailing twelve months is around 4.15%, more than CAFX's 4.01% yield.

Position	TTM	2025	2024	2023
CAFX Congress Intermediate Bond ETF	4.01%	3.92%	0.96%	0.00%
IBTO iShares iBonds Dec 2033 Term Treasury ETF	4.15%	4.05%	4.23%	1.66%

Frequently Asked Questions

Can I hold both IBTO and CAFX in my portfolio?

IBTO and CAFX have a correlation of 0.83, 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 CAFX?

IBTO has higher volatility (1.32%) compared to CAFX (0.75%). In terms of maximum drawdown, IBTO dropped -8.36% vs CAFX's -2.63%.

Which ETF is better, IBTO or CAFX?

On 1-year performance, IBTO leads with 4.04% vs 3.95% for CAFX. On fees, IBTO is cheaper at 0.07% per year. On volatility, CAFX has been the lower-risk option at 0.75%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, IBTO or CAFX?

Over the 1-year period, IBTO has performed better with a 4.04% return vs 3.95%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, IBTO or CAFX?

IBTO is cheaper with a 0.07% expense ratio, compared with 0.35% for CAFX.

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

IBTO has the higher dividend yield at 4.15%, compared with 4.01% for CAFX.

What is the main difference between IBTO and CAFX?

They also come from different issuers: iShares and Congress. Their fees differ too: 0.07% for IBTO and 0.35% for CAFX.

Which has better risk-adjusted returns?

CAFX currently has the higher Sharpe Ratio (1.37 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.