IMAY vs. BAMU

Last updated Jun 6, 2026

IMAY (Innovator International Developed Power Buffer ETF - May) and BAMU (Brookstone Ultra-Short Bond ETF) are both exchange-traded funds - IMAY is a Defined Outcome fund actively managed by Innovator, while BAMU is a Ultrashort Bond fund actively managed by Brookstone. Both are actively managed. Over the past year, IMAY returned 11.67% vs 2.97% for BAMU. At a correlation of -0.05, they often move in opposite directions. IMAY charges 0.85%/yr vs 1.09%/yr for BAMU.

Performance

IMAY vs. BAMU - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Innovator International Developed Power Buffer ETF - May (IMAY) and Brookstone Ultra-Short Bond ETF (BAMU). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, IMAY achieves a 4.39% return, which is significantly higher than BAMU's 1.10% return.

IMAY

• 1D: -1.39%
• 1M: -1.13%
• YTD: 4.39%
• 6M: 5.94%
• 1Y: 11.67%
• 3Y*: —
• 5Y*: —
• 10Y*: —

BAMU

• 1D: 0.02%
• 1M: 0.24%
• YTD: 1.10%
• 6M: 1.29%
• 1Y: 2.97%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

IMAY vs. BAMU - Yearly Performance Comparison

	2026 (YTD)	2025	2024
IMAY Innovator International Developed Power Buffer ETF - May	4.39%	20.08%	0.30%
BAMU Brookstone Ultra-Short Bond ETF	1.10%	3.21%	2.76%

Correlation

The correlation between IMAY and BAMU 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 May 2, 2024	-0.05

IMAY vs. BAMU - Sectors Allocation Comparison

Sectors	IMAY	BAMU
Financial Services	24.7%	98.8%
Industrials	19.8%	-
Healthcare	10.6%	-
Technology	10.3%	-
Consumer Cyclical	7.7%	-
Consumer Defensive	6.7%	-
Basic Materials	5.9%	-
Communication Services	4.5%	-
Energy	4.0%	-
Utilities	4.0%	-
Real Estate	1.9%	-

Return for Risk

IMAY vs. BAMU — Risk / Return Rank

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

IMAY

IMAY Risk / Return Rank: 56
IMAY Sharpe Ratio Rank: 50
IMAY Sortino Ratio Rank: 51
IMAY Omega Ratio Rank: 54
IMAY Calmar Ratio Rank: 60
IMAY Martin Ratio Rank: 67

BAMU

BAMU Risk / Return Rank: 98
BAMU Sharpe Ratio Rank: 98
BAMU Sortino Ratio Rank: 98
BAMU Omega Ratio Rank: 98
BAMU Calmar Ratio Rank: 99
BAMU 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.

IMAY vs. BAMU - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Innovator International Developed Power Buffer ETF - May (IMAY) and Brookstone Ultra-Short Bond ETF (BAMU). 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.

	IMAY	BAMU	Difference
Sharpe ratio: Return per unit of total volatility	1.59	5.05	-3.46
Sortino ratio: Return per unit of downside risk	2.28	8.89	-6.61
Omega ratio: Gain probability vs. loss probability	1.31	2.43	-1.12
Calmar ratio: Return relative to maximum drawdown	2.78	25.24	-22.46
Martin ratio: Return relative to average drawdown	11.45	99.25	-87.80
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IMAY vs. BAMU - Sharpe Ratio Comparison

The current IMAY Sharpe Ratio is 1.59, which is lower than the BAMU Sharpe Ratio of 5.05. The chart below compares the historical Sharpe Ratios of IMAY and BAMU, 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

	IMAY	BAMU	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.59	5.05	-3.46
Sharpe Ratio (All Time) Calculated using the full available price history	1.22	4.15	-2.93

Drawdowns

IMAY vs. BAMU - Drawdown Comparison

The maximum IMAY drawdown since its inception was -9.38%, which is greater than BAMU's maximum drawdown of -0.36%. Use the drawdown chart below to compare losses from any high point for IMAY and BAMU.

Drawdown Indicators

	IMAY	BAMU	Difference
Max Drawdown Largest peak-to-trough decline	-9.38%	-0.36%	-9.02%
Max Drawdown (1Y) Largest decline over 1 year	-4.22%	-0.12%	-4.10%
Current Drawdown Current decline from peak	-1.48%	0.00%	-1.48%
Average Drawdown Average peak-to-trough decline	-1.73%	-0.02%	-1.71%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.02%	0.03%	+0.99%

Volatility

IMAY vs. BAMU - Volatility Comparison

Innovator International Developed Power Buffer ETF - May (IMAY) has a higher volatility of 2.86% compared to Brookstone Ultra-Short Bond ETF (BAMU) at 0.07%. This indicates that IMAY's price experiences larger fluctuations and is considered to be riskier than BAMU based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IMAY	BAMU	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.86%	0.07%	+2.79%
Volatility (6M) Calculated over the trailing 6-month period	5.93%	0.43%	+5.50%
Volatility (1Y) Calculated over the trailing 1-year period	7.36%	0.59%	+6.77%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	9.51%	0.87%	+8.64%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	9.51%	0.87%	+8.64%

IMAY vs. BAMU - Expense Ratio Comparison

IMAY has a 0.85% expense ratio, which is lower than BAMU's 1.09% expense ratio.

Dividends

IMAY vs. BAMU - Dividend Comparison

IMAY has not paid dividends to shareholders, while BAMU's dividend yield for the trailing twelve months is around 3.06%.

Position	TTM	2025	2024	2023
BAMU Brookstone Ultra-Short Bond ETF	3.06%	3.20%	3.97%	0.84%
IMAY Innovator International Developed Power Buffer ETF - May	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both IMAY and BAMU in my portfolio?

IMAY and BAMU 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, IMAY or BAMU?

IMAY has higher volatility (2.86%) compared to BAMU (0.07%). In terms of maximum drawdown, IMAY dropped -9.38% vs BAMU's -0.36%.

Which ETF is better, IMAY or BAMU?

On 1-year performance, IMAY leads with 11.67% vs 2.97% for BAMU. On fees, IMAY is cheaper at 0.85% per year. On volatility, BAMU has been the lower-risk option at 0.07%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, IMAY or BAMU?

Over the 1-year period, IMAY has performed better with a 11.67% return vs 2.97%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, IMAY or BAMU?

IMAY is cheaper with a 0.85% expense ratio, compared with 1.09% for BAMU.

Which ETF pays a higher dividend yield, IMAY or BAMU?

BAMU has the higher dividend yield at 3.06%, compared with 0.00% for IMAY.

What is the main difference between IMAY and BAMU?

IMAY is categorized as Defined Outcome, while BAMU is Ultrashort Bond. They also come from different issuers: Innovator and Brookstone. Their fees differ too: 0.85% for IMAY and 1.09% for BAMU.

Which has better risk-adjusted returns?

BAMU currently has the higher Sharpe Ratio (5.05 vs 1.59), 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.