RB vs. MMAX

Last updated Jun 4, 2026

RB (ProShares Russell 2000 Dynamic Daily Buffer ETF) and MMAX (iShares Large Cap Max Buffer Mar ETF) are both Defined Outcome funds. RB is passively managed, while MMAX is actively managed. At a 0.46 correlation, their price movements are largely independent. RB charges 0.58%/yr vs 0.50%/yr for MMAX.

Performance

RB vs. MMAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in ProShares Russell 2000 Dynamic Daily Buffer ETF (RB) 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, RB achieves a 6.76% return, which is significantly higher than MMAX's 3.09% return.

RB

• 1D: -0.17%
• 1M: 1.63%
• YTD: 6.76%
• 6M: 8.48%
• 1Y: —
• 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)

RB vs. MMAX - Yearly Performance Comparison

	2026 (YTD)	2025
RB ProShares Russell 2000 Dynamic Daily Buffer ETF	6.76%	10.58%
MMAX iShares Large Cap Max Buffer Mar ETF	3.09%	3.77%

Correlation

The correlation between RB and MMAX is 0.46, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (All Time) Calculated using the full available price history since Jun 27, 2025	0.46

Return for Risk

RB vs. MMAX — Risk / Return Rank

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

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.

RB vs. MMAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for ProShares Russell 2000 Dynamic Daily Buffer ETF (RB) 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	RB	MMAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	5.52	—
Sharpe Ratio (All Time) Calculated using the full available price history	3.15	3.13	+0.01

Drawdowns

RB vs. MMAX - Drawdown Comparison

The maximum RB drawdown since its inception was -1.70%, smaller than the maximum MMAX drawdown of -1.93%. Use the drawdown chart below to compare losses from any high point for RB and MMAX.

Drawdown Indicators

	RB	MMAX	Difference
Max Drawdown Largest peak-to-trough decline	-1.70%	-1.93%	+0.23%
Max Drawdown (1Y) Largest decline over 1 year	—	-0.34%	—
Current Drawdown Current decline from peak	-0.47%	-0.13%	-0.34%
Average Drawdown Average peak-to-trough decline	-0.41%	-0.10%	-0.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.07%	—

Volatility

Volatility by Period

	RB	MMAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.36%	—
Volatility (6M) Calculated over the trailing 6-month period	—	0.96%	—
Volatility (1Y) Calculated over the trailing 1-year period	6.21%	1.39%	+4.82%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.21%	2.49%	+3.72%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.21%	2.49%	+3.72%

RB vs. MMAX - Expense Ratio Comparison

RB has a 0.58% expense ratio, which is higher than MMAX's 0.50% expense ratio.

Dividends

RB vs. MMAX - Dividend Comparison

RB's dividend yield for the trailing twelve months is around 2.00%, more than MMAX's 1.27% yield.

Position	TTM	2025
MMAX iShares Large Cap Max Buffer Mar ETF	1.27%	1.31%
RB ProShares Russell 2000 Dynamic Daily Buffer ETF	2.00%	1.78%

Frequently Asked Questions

Can I hold both RB and MMAX in my portfolio?

RB and MMAX have a correlation of 0.46, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, RB or MMAX?

On fees, MMAX is cheaper at 0.50% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, RB or MMAX?

MMAX is cheaper with a 0.50% expense ratio, compared with 0.58% for RB.

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

RB has the higher dividend yield at 2.00%, compared with 1.27% for MMAX.

What is the main difference between RB and MMAX?

They also come from different issuers: ProShares and iShares. Their fees differ too: 0.58% for RB and 0.50% for MMAX.