RBUF vs. IBID

Last updated Jun 20, 2026

RBUF (Innovator U.S. Small Cap 10 Buffer ETF - Quarterly) and IBID (iShares iBonds Oct 2027 Term TIPS ETF) are both exchange-traded funds - RBUF is a Defined Outcome fund actively managed by Innovator, while IBID is a Inflation-Protected Bonds fund tracking the ICE 2027 Maturity US Inflation-Linked Treasury Index. RBUF is actively managed, while IBID is passively managed. Over the past year, RBUF returned 15.17% vs 4.04% for IBID. At a correlation of -0.07, they often move in opposite directions. RBUF charges 0.79%/yr vs 0.10%/yr for IBID.

Performance

RBUF vs. IBID - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Innovator U.S. Small Cap 10 Buffer ETF - Quarterly (RBUF) and iShares iBonds Oct 2027 Term TIPS ETF (IBID). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RBUF achieves a 6.95% return, which is significantly higher than IBID's 1.99% return.

RBUF

• 1D: 0.15%
• 1M: 1.01%
• YTD: 6.95%
• 6M: 5.18%
• 1Y: 15.17%
• 3Y*: —
• 5Y*: —
• 10Y*: —

IBID

• 1D: -0.10%
• 1M: -0.17%
• YTD: 1.99%
• 6M: 2.06%
• 1Y: 4.04%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

RBUF vs. IBID - Yearly Performance Comparison

	2026 (YTD)	2025	2024
RBUF Innovator U.S. Small Cap 10 Buffer ETF - Quarterly	6.95%	10.88%	4.34%
IBID iShares iBonds Oct 2027 Term TIPS ETF	1.99%	5.66%	2.67%

Correlation

The correlation between RBUF and IBID is -0.10, 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	-0.10
Correlation (All Time) Calculated using the full available price history since Jul 1, 2024	-0.07

Return for Risk

RBUF vs. IBID — Risk / Return Rank

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

RBUF

RBUF Risk / Return Rank: 86
RBUF Sharpe Ratio Rank: 81
RBUF Sortino Ratio Rank: 85
RBUF Omega Ratio Rank: 86
RBUF Calmar Ratio Rank: 88
RBUF Martin Ratio Rank: 92

IBID

IBID Risk / Return Rank: 96
IBID Sharpe Ratio Rank: 94
IBID Sortino Ratio Rank: 97
IBID Omega Ratio Rank: 96
IBID Calmar Ratio Rank: 96
IBID Martin Ratio Rank: 96

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.

RBUF vs. IBID - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Innovator U.S. Small Cap 10 Buffer ETF - Quarterly (RBUF) and iShares iBonds Oct 2027 Term TIPS ETF (IBID). 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.

	RBUF	IBID	Difference
Sharpe ratio: Return per unit of total volatility	2.49	3.40	-0.91
Sortino ratio: Return per unit of downside risk	3.63	5.77	-2.14
Omega ratio: Gain probability vs. loss probability	1.50	1.77	-0.27
Calmar ratio: Return relative to maximum drawdown	4.96	8.54	-3.58
Martin ratio: Return relative to average drawdown	21.07	33.17	-12.10

RBUF vs. IBID - Sharpe Ratio Comparison

The current RBUF Sharpe Ratio is 2.49, which is comparable to the IBID Sharpe Ratio of 3.40. The chart below compares the historical Sharpe Ratios of RBUF and IBID, 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

RBUF vs. IBID - Drawdown Comparison

The maximum RBUF drawdown since its inception was -11.36%, which is greater than IBID's maximum drawdown of -1.28%. Use the drawdown chart below to compare losses from any high point for RBUF and IBID.

Drawdown Indicators

	RBUF	IBID	Difference
Max Drawdown Largest peak-to-trough decline	-11.36%	-1.28%	-10.08%
Max Drawdown (1Y) Largest decline over 1 year	-3.09%	-0.49%	-2.60%
Current Drawdown Current decline from peak	0.00%	-0.49%	+0.49%
Average Drawdown Average peak-to-trough decline	-1.31%	-0.22%	-1.09%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.73%	0.13%	+0.60%

Volatility

RBUF vs. IBID - Volatility Comparison

Innovator U.S. Small Cap 10 Buffer ETF - Quarterly (RBUF) has a higher volatility of 0.79% compared to iShares iBonds Oct 2027 Term TIPS ETF (IBID) at 0.36%. This indicates that RBUF's price experiences larger fluctuations and is considered to be riskier than IBID based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RBUF	IBID	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.79%	0.36%	+0.43%
Volatility (6M) Calculated over the trailing 6-month period	3.99%	0.86%	+3.13%
Volatility (1Y) Calculated over the trailing 1-year period	6.17%	1.24%	+4.93%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	8.64%	2.25%	+6.39%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	8.64%	2.25%	+6.39%

RBUF vs. IBID - Expense Ratio Comparison

RBUF has a 0.79% expense ratio, which is higher than IBID's 0.10% expense ratio.

Dividends

RBUF vs. IBID - Dividend Comparison

RBUF has not paid dividends to shareholders, while IBID's dividend yield for the trailing twelve months is around 3.68%.

Position	TTM	2025	2024	2023
IBID iShares iBonds Oct 2027 Term TIPS ETF	3.68%	4.43%	4.24%	0.81%
RBUF Innovator U.S. Small Cap 10 Buffer ETF - Quarterly	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both RBUF and IBID in my portfolio?

RBUF and IBID have a correlation of -0.10, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RBUF or IBID?

RBUF has higher volatility (0.79%) compared to IBID (0.36%). In terms of maximum drawdown, RBUF dropped -11.36% vs IBID's -1.28%.

Which ETF is better, RBUF or IBID?

On 1-year performance, RBUF leads with 15.17% vs 4.04% for IBID. On fees, IBID is cheaper at 0.10% per year. On volatility, IBID has been the lower-risk option at 0.36%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, RBUF or IBID?

Over the 1-year period, RBUF has performed better with a 15.17% return vs 4.04%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, RBUF or IBID?

IBID is cheaper with a 0.10% expense ratio, compared with 0.79% for RBUF.

Which ETF pays a higher dividend yield, RBUF or IBID?

IBID has the higher dividend yield at 3.68%, compared with 0.00% for RBUF.

What is the main difference between RBUF and IBID?

RBUF is categorized as Defined Outcome, while IBID is Inflation-Protected Bonds. They also come from different issuers: Innovator and iShares. Their fees differ too: 0.79% for RBUF and 0.10% for IBID.

Which has better risk-adjusted returns?

IBID currently has the higher Sharpe Ratio (3.40 vs 2.49), 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.