The 2x leveraged memory chip ETF jointly issued by Roundhill and T-REX $RAM was listed on Cboe BZX on June 24, with the underlying being the DRAM ETF. After hours on the same day, Micron $MU reported its strongest quarterly results ever, with $41.46B in revenue and an 84.9% gross margin.

The DRAM ETF was listed on April 2, and its AUM exceeded $1B within 10 trading days. As of June 24, its AUM surpassed $20B, with a total return of 179.84%, making it the fastest-growing product in the ETF industry.

Holdings are highly concentrated: SK Hynix at approximately 29%, Micron at approximately 27%, and Samsung at approximately 21%. The three combined account for about 77% and are also the only three HBM suppliers globally.

RAM rebalances daily, aiming to achieve 200% of DRAM's daily return. The net expense ratio is 1.25%, with Citibank as custodian. Options trading is not currently supported. In its prospectus, Roundhill explicitly warns that the fund "is not suitable for all investors."

77% of the portfolio is concentrated in three stocks, further amplified by 2x leverage. Approximately 49% of the DRAM ETF's underlying assets trade in Seoul, and overnight volatility in Korean stocks is concentrated at the U.S. market open. RAM magnifies this gap by 2x.

On June 23, the KOSPI plunged 10%, and the DRAM ETF fell about 14% that day. If RAM had already been listed, the theoretical single-day decline would have been close to 28%. The daily rebalancing mechanism of leveraged ETFs also means that even if DRAM ultimately ends flat in a volatile market, RAM will still incur losses.

The DRAM ETF is currently down about 16% from its 52-week high. Using RAM to add leverage means applying 2x leverage to an asset that already has extremely high beta. If the direction is right, the returns are substantial; if wrong, the exit window may be much narrower than expected.