XBIL vs. CGUI

Last updated Jun 24, 2026

XBIL (US Treasury 6 Month Bill ETF) and CGUI (Capital Group Ultra Short Income ETF) are both Ultrashort Bond funds. XBIL is passively managed, while CGUI is actively managed. Over the past year, XBIL returned 3.82% vs 4.21% for CGUI. At a 0.17 correlation, their price movements are largely independent. XBIL charges 0.15%/yr vs 0.18%/yr for CGUI.

Performance

XBIL vs. CGUI - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in US Treasury 6 Month Bill ETF (XBIL) and Capital Group Ultra Short Income ETF (CGUI). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with XBIL having a 1.57% return and CGUI slightly higher at 1.64%.

XBIL

• 1D: 0.01%
• 1M: 0.22%
• YTD: 1.57%
• 6M: 1.67%
• 1Y: 3.82%
• 3Y*: 4.60%
• 5Y*: —
• 10Y*: —

CGUI

• 1D: 0.06%
• 1M: 0.31%
• YTD: 1.64%
• 6M: 1.76%
• 1Y: 4.21%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

XBIL vs. CGUI - Yearly Performance Comparison

	2026 (YTD)	2025	2024
XBIL US Treasury 6 Month Bill ETF	1.57%	4.17%	2.73%
CGUI Capital Group Ultra Short Income ETF	1.64%	4.99%	3.05%

Correlation

The correlation between XBIL and CGUI is 0.07, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.07
Correlation (All Time) Calculated using the full available price history since Jun 27, 2024	0.17

The correlation between XBIL and CGUI shifts across timeframes, from 0.07 (1 year) to 0.17 (all time), reflecting how their relationship changes across market environments.

Return for Risk

XBIL vs. CGUI — Risk / Return Rank

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

XBIL

XBIL Risk / Return Rank: 100
XBIL Sharpe Ratio Rank: 100
XBIL Sortino Ratio Rank: 100
XBIL Omega Ratio Rank: 99
XBIL Calmar Ratio Rank: 100
XBIL Martin Ratio Rank: 100

CGUI

CGUI Risk / Return Rank: 99
CGUI Sharpe Ratio Rank: 98
CGUI Sortino Ratio Rank: 99
CGUI Omega Ratio Rank: 98
CGUI Calmar Ratio Rank: 99
CGUI Martin Ratio Rank: 99

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.

XBIL vs. CGUI - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for US Treasury 6 Month Bill ETF (XBIL) and Capital Group Ultra Short Income ETF (CGUI). 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.

	XBIL	CGUI	Difference
Sharpe ratio: Return per unit of total volatility	12.56	5.78	+6.78
Sortino ratio: Return per unit of downside risk	38.47	10.40	+28.07
Omega ratio: Gain probability vs. loss probability	10.10	2.56	+7.54
Calmar ratio: Return relative to maximum drawdown	64.01	23.82	+40.19
Martin ratio: Return relative to average drawdown	592.11	99.46	+492.65

XBIL vs. CGUI - Sharpe Ratio Comparison

The current XBIL Sharpe Ratio is 12.56, which is higher than the CGUI Sharpe Ratio of 5.78. The chart below compares the historical Sharpe Ratios of XBIL and CGUI, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

XBIL vs. CGUI - Drawdown Comparison

The maximum XBIL drawdown since its inception was -0.08%, smaller than the maximum CGUI drawdown of -0.18%. Use the drawdown chart below to compare losses from any high point for XBIL and CGUI.

Drawdown Indicators

	XBIL	CGUI	Difference
Max Drawdown Largest peak-to-trough decline	-0.08%	-0.18%	+0.10%
Max Drawdown (1Y) Largest decline over 1 year	-0.06%	-0.18%	+0.12%
Max Drawdown (3Y) Largest decline over 3 years	-0.07%	—	—
Current Drawdown Current decline from peak	0.00%	-0.04%	+0.04%
Average Drawdown Average peak-to-trough decline	-0.00%	-0.02%	+0.02%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.01%	0.04%	-0.03%

Volatility

XBIL vs. CGUI - Volatility Comparison

The current volatility for US Treasury 6 Month Bill ETF (XBIL) is 0.12%, while Capital Group Ultra Short Income ETF (CGUI) has a volatility of 0.23%. This indicates that XBIL experiences smaller price fluctuations and is considered to be less risky than CGUI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	XBIL	CGUI	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.12%	0.23%	-0.11%
Volatility (6M) Calculated over the trailing 6-month period	0.19%	0.56%	-0.37%
Volatility (1Y) Calculated over the trailing 1-year period	0.31%	0.73%	-0.42%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.38%	0.80%	-0.42%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.38%	0.80%	-0.42%

XBIL vs. CGUI - Expense Ratio Comparison

XBIL has a 0.15% expense ratio, which is lower than CGUI's 0.18% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

XBIL vs. CGUI - Dividend Comparison

XBIL's dividend yield for the trailing twelve months is around 3.76%, less than CGUI's 3.88% yield.

Position	TTM	2025	2024	2023
CGUI Capital Group Ultra Short Income ETF	3.88%	4.17%	2.62%	0.00%
XBIL US Treasury 6 Month Bill ETF	3.76%	4.01%	4.90%	4.30%

Frequently Asked Questions

Can I hold both XBIL and CGUI in my portfolio?

XBIL and CGUI have a correlation of 0.07, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, XBIL or CGUI?

CGUI has higher volatility (0.23%) compared to XBIL (0.12%). In terms of maximum drawdown, XBIL dropped -0.08% vs CGUI's -0.18%.

Which ETF is better, XBIL or CGUI?

On 1-year performance, CGUI leads with 4.21% vs 3.82% for XBIL. On fees, XBIL is cheaper at 0.15% per year. On volatility, XBIL has been the lower-risk option at 0.12%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, XBIL or CGUI?

Over the 1-year period, CGUI has performed better with a 4.21% return vs 3.82%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, XBIL or CGUI?

XBIL is cheaper with a 0.15% expense ratio, compared with 0.18% for CGUI.

Which ETF pays a higher dividend yield, XBIL or CGUI?

CGUI has the higher dividend yield at 3.88%, compared with 3.76% for XBIL.

What is the main difference between XBIL and CGUI?

They also come from different issuers: US Benchmark Series and Capital Group. Their fees differ too: 0.15% for XBIL and 0.18% for CGUI.

Which has better risk-adjusted returns?

XBIL currently has the higher Sharpe Ratio (12.56 vs 5.78), 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.