Communications services companies rose as traders bet on further deal activity in the sector.
Shares of satellite concern GlobalStar surged after online speculation that Apple was planning to work with the company on linking its next iPhone to satellite service.
Shares of Adtran fell sharply after the networking concern agreed to buy rival ADVA in a deal valued at $931.1 million.
Zoom Video Communications shares tumbled in late trading after the videoconferencing concern's quarterly earnings growth lagged analysts' expectations.
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(END) Dow Jones Newswires