MarketWatch: Pandora Media has suffered on Wall Street since Apple debuted a competitive service, but investors reversed the trend after the Internet radio service claimed no ill effects from its new rival and showed it can make more money from a free music service. Pandora had lost more than 10% of its market capitalization since Apple Music — which includes a human-curated online radio station — launched on June 30. However, the stock recovered all of that loss in after-hours trading Thursday.