Pandora Media Inc. shares were halted in premarket trade Tuesday. The company recently secured a $480 million investment from Liberty Media Corp.-owned satellite radio company Sirius XM Holdings Inc. and has been the subject of speculation it is a takeover target. On Monday, the stock rallied on a report that Co-founder and Chief Executive Tim Westergren planned to step down. The stock has fallen 35% in 2017, while the S&P 500 has gained 9%.
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