CDW CORP set to join the S&P 500CDW Corp. CDW, +0.71% will join the S&P 500 index this month, and shares jumped more than 5% Tuesday in after-hours trading following the announcement. S&P Global announced Tuesday afternoon that the tech company would enter the index ahead of trading on Monday, Sept. 23, to replace Total System Services Inc. TSS, -0.96%, which is being acquired by Global Payments Inc. GPN, -1.41% CDW shares have increased more than 40% so far this year, as the S&P 500 index SPX, +0.26% has gained 19.9%.
Source MArketwatch
