Group 1 - S&P Dow Jones Indices announced that SanDisk Corp. will be added to the S&P 500 index on Friday, replacing Interpublic Group of Companies Inc. [1] - Following the announcement, SanDisk's stock (SNDK.US) rose over 10% in after-hours trading [1]. - SanDisk's market capitalization is approximately $34 billion, which is significantly higher than other constituents in the S&P SmallCap 600 index, making it an outlier [1]. Group 2 - SanDisk outperformed Strategy Inc., a major cryptocurrency holder, which recently qualified for inclusion in the S&P 500 index [1]. - The announcement regarding SanDisk's inclusion came earlier than some investors had anticipated, as the market expected adjustments to occur in early December [1]. - The index provider has discretion over the timing and method of adjustments, as evidenced by a similar situation in June [1]. - SanDisk's stock price has surged nearly 400% over the past three months, driven by the AI boom [1].
美股异动｜闪迪盘后一度涨超10%，将被纳入标普500指数