Interactive Brokers Climbs on Replacing Walgreens in S&P 500

(Updates for postmarket share move, adds Talen Energy.)

Interactive Brokers Group Inc. shares climb as much as 8% in postmarket trading Monday after the S&P Dow Jones Indices announced that the automated electronic broker will join the S&P 500 Index before trading opens Aug. 28, replacing Walgreens Boots Alliance Inc.