BUFI vs. MMAX

Last updated Jun 4, 2026

BUFI (AB International Buffer ETF) and MMAX (iShares Large Cap Max Buffer Mar ETF) are both Defined Outcome funds. Both are actively managed. Over the past year, BUFI returned 12.80% vs 7.67% for MMAX. A 0.58 correlation means they provide meaningful diversification when combined. BUFI charges 0.69%/yr vs 0.50%/yr for MMAX.

Performance

BUFI vs. MMAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in AB International Buffer ETF (BUFI) and iShares Large Cap Max Buffer Mar ETF (MMAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BUFI achieves a 4.92% return, which is significantly higher than MMAX's 3.09% return.

BUFI

• 1D: -0.31%
• 1M: 1.83%
• YTD: 4.92%
• 6M: 6.32%
• 1Y: 12.80%
• 3Y*: —
• 5Y*: —
• 10Y*: —

MMAX

• 1D: -0.13%
• 1M: 0.60%
• YTD: 3.09%
• 6M: 3.75%
• 1Y: 7.67%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

BUFI vs. MMAX - Yearly Performance Comparison

	2026 (YTD)	2025
BUFI AB International Buffer ETF	4.92%	12.18%
MMAX iShares Large Cap Max Buffer Mar ETF	3.09%	5.88%

Correlation

The correlation between BUFI and MMAX is 0.60, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.60
Correlation (All Time) Calculated using the full available price history since Apr 2, 2025	0.58

The correlation between BUFI and MMAX has been stable across timeframes, ranging from 0.58 to 0.60 - a consistent structural relationship.

Return for Risk

BUFI vs. MMAX — Risk / Return Rank

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

BUFI

BUFI Risk / Return Rank: 47
BUFI Sharpe Ratio Rank: 44
BUFI Sortino Ratio Rank: 46
BUFI Omega Ratio Rank: 47
BUFI Calmar Ratio Rank: 46
BUFI Martin Ratio Rank: 53

MMAX

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

BUFI vs. MMAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for AB International Buffer ETF (BUFI) and iShares Large Cap Max Buffer Mar ETF (MMAX). 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.

	BUFI	MMAX	Difference
Sharpe ratio: Return per unit of total volatility	1.53	5.52	-4.00
Sortino ratio: Return per unit of downside risk	2.25	10.56	-8.32
Omega ratio: Gain probability vs. loss probability	1.30	2.51	-1.22
Calmar ratio: Return relative to maximum drawdown	2.26	22.49	-20.23
Martin ratio: Return relative to average drawdown	8.98	112.49	-103.50
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

BUFI vs. MMAX - Sharpe Ratio Comparison

The current BUFI Sharpe Ratio is 1.53, which is lower than the MMAX Sharpe Ratio of 5.52. The chart below compares the historical Sharpe Ratios of BUFI and MMAX, 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

	BUFI	MMAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.53	5.52	-4.00
Sharpe Ratio (All Time) Calculated using the full available price history	1.50	3.13	-1.64

Drawdowns

BUFI vs. MMAX - Drawdown Comparison

The maximum BUFI drawdown since its inception was -7.43%, which is greater than MMAX's maximum drawdown of -1.93%. Use the drawdown chart below to compare losses from any high point for BUFI and MMAX.

Drawdown Indicators

	BUFI	MMAX	Difference
Max Drawdown Largest peak-to-trough decline	-7.43%	-1.93%	-5.50%
Max Drawdown (1Y) Largest decline over 1 year	-5.69%	-0.34%	-5.35%
Current Drawdown Current decline from peak	-0.32%	-0.13%	-0.19%
Average Drawdown Average peak-to-trough decline	-0.86%	-0.10%	-0.76%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.43%	0.07%	+1.36%

Volatility

BUFI vs. MMAX - Volatility Comparison

AB International Buffer ETF (BUFI) has a higher volatility of 2.20% compared to iShares Large Cap Max Buffer Mar ETF (MMAX) at 0.36%. This indicates that BUFI's price experiences larger fluctuations and is considered to be riskier than MMAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BUFI	MMAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.20%	0.36%	+1.84%
Volatility (6M) Calculated over the trailing 6-month period	7.05%	0.96%	+6.09%
Volatility (1Y) Calculated over the trailing 1-year period	8.43%	1.39%	+7.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	9.15%	2.49%	+6.66%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	9.15%	2.49%	+6.66%

BUFI vs. MMAX - Expense Ratio Comparison

BUFI has a 0.69% expense ratio, which is higher than MMAX's 0.50% expense ratio.

Dividends

BUFI vs. MMAX - Dividend Comparison

BUFI has not paid dividends to shareholders, while MMAX's dividend yield for the trailing twelve months is around 1.27%.

Position	TTM	2025
BUFI AB International Buffer ETF	0.00%	0.00%
MMAX iShares Large Cap Max Buffer Mar ETF	1.27%	1.31%

Frequently Asked Questions

Can I hold both BUFI and MMAX in my portfolio?

BUFI and MMAX have a correlation of 0.60, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BUFI or MMAX?

BUFI has higher volatility (2.20%) compared to MMAX (0.36%). In terms of maximum drawdown, BUFI dropped -7.43% vs MMAX's -1.93%.

Which ETF is better, BUFI or MMAX?

On 1-year performance, BUFI leads with 12.80% vs 7.67% for MMAX. On fees, MMAX is cheaper at 0.50% per year. On volatility, MMAX 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, BUFI or MMAX?

Over the 1-year period, BUFI has performed better with a 12.80% return vs 7.67%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, BUFI or MMAX?

MMAX is cheaper with a 0.50% expense ratio, compared with 0.69% for BUFI.

Which ETF pays a higher dividend yield, BUFI or MMAX?

MMAX has the higher dividend yield at 1.27%, compared with 0.00% for BUFI.

What is the main difference between BUFI and MMAX?

They also come from different issuers: AllianceBernstein and iShares. Their fees differ too: 0.69% for BUFI and 0.50% for MMAX.

Which has better risk-adjusted returns?

MMAX currently has the higher Sharpe Ratio (5.52 vs 1.53), 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.