Shares of The Trade Desk (NASDAQ: TTD) jumped on the news that the company will be added to the S&P 500 index.In pre-market trading on Tuesday, the stock was up 14.05% to $86. The TTD share price closed the last trading session at $75.43, reflecting a year-to-date loss of almost 36%. TTD one-day stock price chart. Source: Google FinanceThe stock is set to start trading on the index at market opening on July 18. The American real-time programmatic marketing company is replacing Ansys following its acquisitio ...