One of the hardest parts of the memory trade is picking the stock. Forecasts have global memory chip revenue going from $200b in 2025 to over $700B in 2027. That's more than triple in two years. The demand side is easy to see. Every AI chip needs memory, and the datacenters running them need a lot of it to store and move data. The hard part is that memory is a few different businesses. HBM, DRAM and NAND flash all benefit from the same demand, but they don't always move together, and different companies lead at different times. You can be right on the theme and still pick the wrong ticker. $DISK is one way to play the trade without picking. It's the Tema Memory ETF, with 18 holdings across the memory group. $SNDK, Kioxia and SK Hynix are the top three and about half the fund. $MU, Samsung, $STX and $WDC are in there too, and the top 9 holdings are 77.82% of the fund. It also holds Korean and Japanese names that can be hard to buy from a US account. Kioxia, SK Hynix, SK Square and Samsung are about 41% of those top 9. It's a single-theme, concentrated ETF with a 0.75% expense ratio, and it launched June 29, 2026, so there's a short track record. Size it like a theme bet. Other ways to play the trade are owning individual names or building your own basket. $DISK is just one option.