US stocks show abnormal movement | Unexpectedly selected into S&P 500 index, Trade Desk (TTD.US) rose more than 9% to a 5-month high.

According to the "Securities Times" APP, on Tuesday, Trade Desk (TTD.US) rose more than 9%, hitting a 5-month high of $82.43. In terms of news, on Monday, S&P Dow Jones Indices announced that Trade Desk will replace Ansys in the S&P 500 index before the market opens on Friday. This adjustment is due to Synopsys' acquisition of Ansys, which is expected to be completed on Thursday. Trade Desk's inclusion was unexpected by the market, as its market value is only $37 billion.