SPCX ▲ +0.1% - Space Exploration Technologies Corp. $SPCX is expected to see an estimated $15.5B-$22B in passive buying today as its Nasdaq-100 weighting more than doubles. Most of the mechanical flow is expected around Friday’s closing auction, with the new weighting effective Monday, September 21. Space Exploration Technologies shares rose 0.1% today ahead of a significant index rebalancing that will more than double its weighting in the Nasdaq-100, driving an estimated $15.5 billion to $22 billion in passive buying. The bulk of this mechanical buying flow is expected to hit during Friday's closing auction, with the new weighting taking effect the following Monday, making the stock a major beneficiary of index fund rebalancing activity. 18-SEP-2026 08:07 AM ET