The memory chip sector experienced a significant downturn, with the DRAM ETF falling over 4% despite positive early session news. Initial reports pointed to a rally driven by abating geopolitical tensions between the U.S. and Iran and the successful IPO of Chinese memory manufacturer CXMT. However, this positive sentiment appears to have been short-lived, with the sector reversing course during the trading day. The precise catalyst for this reversal is not immediately clear from available market commentary, suggesting that underlying negative sentiment from the previous week's sell-off may be reasserting itself, or that investors are taking profits after a brief morning rally ahead of key earnings reports from major tech companies this week.