[Effective Tomorrow! Marvell Technology and Flex Officially Added to the S&P 500 Index] BlockBeats News, June 21, S&P Dow Jones Indices announced that AI infrastructure concept stock Marvell Technology (MRVL.US) and electronics manufacturing services giant Flex (FLEX.US) will be officially added to the S&P 500 Index before the market opens tomorrow (June 22). They will replace pool equipment manufacturer Pool Corp. (POOL.US) and food company Campbell Soup Company (CPB.US), respectively. This adjustment is part of S&P Dow Jones Indices' latest quarterly routine index rebalancing. Adjustments to index components typically lead to short-term concentrated passive fund inflows into the newly added stocks, and market participants will closely watch the performance of these two stocks at tomorrow's market open.