CGUI vs. RBIL

Last updated Jun 23, 2026

CGUI (Capital Group Ultra Short Income ETF) and RBIL (F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF) are both exchange-traded funds - CGUI is a Ultrashort Bond fund actively managed by Capital Group, while RBIL is a Inflation-Protected Bonds fund tracking the Bloomberg US Ultrashort TIPS 1-13 Months Index. CGUI is actively managed, while RBIL is passively managed. Over the past year, CGUI returned 4.21% vs 3.95% for RBIL. At a correlation of -0.10, they often move in opposite directions. CGUI charges 0.18%/yr vs 0.17%/yr for RBIL.

Performance

CGUI vs. RBIL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Capital Group Ultra Short Income ETF (CGUI) and F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CGUI achieves a 1.58% return, which is significantly lower than RBIL's 2.31% return.

CGUI

• 1D: -0.06%
• 1M: 0.25%
• YTD: 1.58%
• 6M: 1.66%
• 1Y: 4.21%
• 3Y*: —
• 5Y*: —
• 10Y*: —

RBIL

• 1D: -0.05%
• 1M: -0.20%
• YTD: 2.31%
• 6M: 2.35%
• 1Y: 3.95%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

CGUI vs. RBIL - Yearly Performance Comparison

	2026 (YTD)	2025
CGUI Capital Group Ultra Short Income ETF	1.58%	4.24%
RBIL F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF	2.31%	2.85%

Correlation

The correlation between CGUI and RBIL is -0.17, meaning they tend to move in opposite directions. This is especially valuable for risk management - when one declines, the other has historically tended to hold steady or rise.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.17
Correlation (All Time) Calculated using the full available price history since Feb 25, 2025	-0.10

Return for Risk

CGUI vs. RBIL — Risk / Return Rank

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

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

RBIL

RBIL Risk / Return Rank: 97
RBIL Sharpe Ratio Rank: 97
RBIL Sortino Ratio Rank: 97
RBIL Omega Ratio Rank: 98
RBIL Calmar Ratio Rank: 95
RBIL Martin Ratio Rank: 97

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.

CGUI vs. RBIL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Capital Group Ultra Short Income ETF (CGUI) and F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL). 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.

	CGUI	RBIL	Difference
Sharpe ratio: Return per unit of total volatility	5.78	4.18	+1.60
Sortino ratio: Return per unit of downside risk	10.41	6.39	+4.02
Omega ratio: Gain probability vs. loss probability	2.56	2.06	+0.50
Calmar ratio: Return relative to maximum drawdown	23.83	7.59	+16.25
Martin ratio: Return relative to average drawdown	99.69	44.07	+55.62

CGUI vs. RBIL - Sharpe Ratio Comparison

The current CGUI Sharpe Ratio is 5.78, which is higher than the RBIL Sharpe Ratio of 4.18. The chart below compares the historical Sharpe Ratios of CGUI and RBIL, 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

CGUI vs. RBIL - Drawdown Comparison

The maximum CGUI drawdown since its inception was -0.18%, smaller than the maximum RBIL drawdown of -0.52%. Use the drawdown chart below to compare losses from any high point for CGUI and RBIL.

Drawdown Indicators

	CGUI	RBIL	Difference
Max Drawdown Largest peak-to-trough decline	-0.18%	-0.52%	+0.34%
Max Drawdown (1Y) Largest decline over 1 year	-0.18%	-0.52%	+0.34%
Current Drawdown Current decline from peak	-0.10%	-0.51%	+0.41%
Average Drawdown Average peak-to-trough decline	-0.02%	-0.07%	+0.05%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.04%	0.09%	-0.05%

Volatility

CGUI vs. RBIL - Volatility Comparison

The current volatility for Capital Group Ultra Short Income ETF (CGUI) is 0.24%, while F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL) has a volatility of 0.36%. This indicates that CGUI experiences smaller price fluctuations and is considered to be less risky than RBIL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CGUI	RBIL	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.24%	0.36%	-0.12%
Volatility (6M) Calculated over the trailing 6-month period	0.56%	0.85%	-0.29%
Volatility (1Y) Calculated over the trailing 1-year period	0.73%	0.95%	-0.22%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	0.80%	1.07%	-0.27%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	0.80%	1.07%	-0.27%

CGUI vs. RBIL - Expense Ratio Comparison

CGUI has a 0.18% expense ratio, which is higher than RBIL's 0.17% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

CGUI vs. RBIL - Dividend Comparison

CGUI's dividend yield for the trailing twelve months is around 3.89%, less than RBIL's 4.38% yield.

Position	TTM	2025	2024
CGUI Capital Group Ultra Short Income ETF	3.89%	4.17%	2.62%
RBIL F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF	4.38%	3.65%	0.00%

Frequently Asked Questions

Can I hold both CGUI and RBIL in my portfolio?

CGUI and RBIL have a correlation of -0.17, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CGUI or RBIL?

RBIL has higher volatility (0.36%) compared to CGUI (0.24%). In terms of maximum drawdown, CGUI dropped -0.18% vs RBIL's -0.52%.

Which ETF is better, CGUI or RBIL?

On 1-year performance, CGUI leads with 4.21% vs 3.95% for RBIL. On fees, RBIL is cheaper at 0.17% per year. On volatility, CGUI has been the lower-risk option at 0.24%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, CGUI or RBIL?

Over the 1-year period, CGUI has performed better with a 4.21% return vs 3.95%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, CGUI or RBIL?

RBIL is cheaper with a 0.17% expense ratio, compared with 0.18% for CGUI.

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

RBIL has the higher dividend yield at 4.38%, compared with 3.89% for CGUI.

What is the main difference between CGUI and RBIL?

CGUI is categorized as Ultrashort Bond, while RBIL is Inflation-Protected Bonds. They also come from different issuers: Capital Group and F/m. Their fees differ too: 0.18% for CGUI and 0.17% for RBIL.

Which has better risk-adjusted returns?

CGUI currently has the higher Sharpe Ratio (5.78 vs 4.18), 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.