RBIL vs. IBIE

Last updated Aug 4, 2026

RBIL (F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF) and IBIE (iShares iBonds Oct 2028 Term TIPS ETF) are both Inflation-Protected Bonds funds - RBIL tracks the Bloomberg US Ultrashort TIPS 1-13 Months Index while IBIE tracks the ICE 2028 Maturity US Inflation-Linked Treasury Index. Both are passively managed. Over the past year, RBIL returned 3.92% vs 3.00% for IBIE. Their 0.36 correlation means their historical movements had little consistent relationship. RBIL charges 0.17%/yr vs 0.10%/yr for IBIE.

Performance

RBIL vs. IBIE - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL) and iShares iBonds Oct 2028 Term TIPS ETF (IBIE). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RBIL achieves a 2.68% return, which is significantly higher than IBIE's 1.87% return.

RBIL

• 1D: -0.02%
• 1M: 0.24%
• 6M: 2.36%
• YTD: 2.68%
• 1Y: 3.92%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 3.88%

IBIE

• 1D: -0.03%
• 1M: 0.26%
• 6M: 1.43%
• YTD: 1.87%
• 1Y: 3.00%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 5.30%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
IBIE iShares iBonds Oct 2028 Term TIPS ETF	$740.01K	$732.57K	$770.84K
RBIL F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF	$1.11M	$1.90M	$2.32M

RBIL vs. IBIE - Yearly Performance Comparison

	2026 (YTD)	2025
RBIL F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF	2.68%	2.85%
IBIE iShares iBonds Oct 2028 Term TIPS ETF	1.87%	4.73%

Correlation

The correlation between RBIL and IBIE is 0.43, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.43
Correlation (All Time) Calculated using the full available price history since Feb 25, 2025	0.36

Return for Risk

RBIL vs. IBIE — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

RBIL

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

IBIE

IBIE Risk / Return Rank: 87
IBIE Sharpe Ratio Rank: 82
IBIE Sortino Ratio Rank: 90
IBIE Omega Ratio Rank: 88
IBIE Calmar Ratio Rank: 91
IBIE Martin Ratio Rank: 85

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

RBIL vs. IBIE - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL) and iShares iBonds Oct 2028 Term TIPS ETF (IBIE). 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.

	RBIL	IBIE	Difference
Sharpe ratio: Return per unit of total volatility	4.11	2.05	+2.06
Sortino ratio: Return per unit of downside risk	6.33	3.34	+2.99
Omega ratio: Gain probability vs. loss probability	2.05	1.42	+0.63
Calmar ratio: Return relative to maximum drawdown	7.00	4.19	+2.81
Martin ratio: Return relative to average drawdown	28.60	12.84	+15.77

RBIL vs. IBIE - Sharpe Ratio Comparison

The current RBIL Sharpe Ratio is 4.11, which is higher than the IBIE Sharpe Ratio of 2.05. The chart below compares the historical Sharpe Ratios of RBIL and IBIE, 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

RBIL vs. IBIE - Drawdown Comparison

The maximum RBIL drawdown since its inception was -0.56%, smaller than the maximum IBIE drawdown of -1.70%. Use the drawdown chart below to compare losses from any high point for RBIL and IBIE.

Drawdown Indicators

	RBIL	IBIE	Difference
Max Drawdown Largest peak-to-trough decline	-0.56%	-1.70%	+1.14%
Max Drawdown (1Y) Largest decline over 1 year	-0.56%	-0.72%	+0.16%
Current Drawdown Current decline from peak	-0.15%	-0.23%	+0.08%
Average Drawdown Average peak-to-trough decline	-0.08%	-0.38%	+0.30%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.14%	0.23%	-0.09%

Volatility

RBIL vs. IBIE - Volatility Comparison

F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL) and iShares iBonds Oct 2028 Term TIPS ETF (IBIE) have volatilities of 0.30% and 0.30%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RBIL	IBIE	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.30%	0.30%	0.00%
Volatility (6M) Calculated over the trailing 6-month period	0.90%	1.07%	-0.17%
Volatility (1Y) Calculated over the trailing 1-year period	0.96%	1.47%	-0.51%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	1.06%	2.80%	-1.74%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	1.06%	2.80%	-1.74%

RBIL vs. IBIE - Expense Ratio Comparison

RBIL has a 0.17% expense ratio, which is higher than IBIE's 0.10% 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

RBIL vs. IBIE - Dividend Comparison

RBIL's dividend yield for the trailing twelve months is around 4.16%, less than IBIE's 4.96% yield.

Position	TTM	2025	2024	2023
IBIE iShares iBonds Oct 2028 Term TIPS ETF	4.96%	4.09%	4.23%	0.75%
RBIL F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF	4.16%	3.65%	0.00%	0.00%

Frequently Asked Questions

Can I hold both RBIL and IBIE in my portfolio?

RBIL and IBIE have a correlation of 0.43, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RBIL or IBIE?

IBIE has higher volatility (0.30%) compared to RBIL (0.30%). In terms of maximum drawdown, RBIL dropped -0.56% vs IBIE's -1.70%.

Which ETF is better, RBIL or IBIE?

On 1-year performance, RBIL leads with 3.92% vs 3.00% for IBIE. On fees, IBIE is cheaper at 0.10% per year. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, RBIL or IBIE?

Over the 1-year period, RBIL has performed better with a 3.92% return vs 3.00%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, RBIL or IBIE?

IBIE is cheaper with a 0.10% expense ratio, compared with 0.17% for RBIL.

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

IBIE has the higher dividend yield at 4.96%, compared with 4.16% for RBIL.

What is the main difference between RBIL and IBIE?

RBIL tracks Bloomberg US Ultrashort TIPS 1-13 Months Index, while IBIE tracks ICE 2028 Maturity US Inflation-Linked Treasury Index. They also come from different issuers: F/m and iShares. Their fees differ too: 0.17% for RBIL and 0.10% for IBIE.

Which has better risk-adjusted returns?

RBIL currently has the higher Sharpe Ratio (4.11 vs 2.05), 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.