** Shares of The Trade Desk TTD.O surge 15% in extended trade, after the announcement that the software company will join the S&P 500 .SPX
** TTD will join the S&P 500, effective prior to the start of trading on Friday - S&P Dow Jones Indices
** TTD replaces Ansys ANSS.O, which is set to be acquired by Synopsys SNPS.O in an agreement expected to be completed on July 17 - S&P Dow Jones Indices