[This Week, U.S. ETF Manager Roundhill Sold Part of Its Samsung Holdings and Bought ChangXin Memory] According to analyst qinbafrank, U.S. ETF manager Roundhill made significant adjustments to its DRAM-themed fund this week, reducing its holdings in Samsung Electronics while simultaneously purchasing ChangXin Memory. This marks the first time China's leading memory company has entered mainstream DRAM investment products in the U.S. stock market. On Tuesday and Wednesday, Roundhill cumulatively purchased 65 million shares of ChangXin Memory, raising ChangXin Memory's weight in the DRAM ETF to 2.47%. Meanwhile, from Monday to Wednesday, Roundhill reduced its holdings of Samsung Electronics by approximately 1 million shares daily, selling a total of 3 million shares over three days.