Tech stocks: Pandora shares surge

Shares of Internet radio company Pandora have jumped 4% in pre-market trading after revealing new details on its monthly listeners.

Pandora reports 72.7 million active listeners in September, up 25% compared to the same time last year. The company also showed jumps in listener hours and share of total U.S. radio listening.

The boost in listeners is a good sign for Pandora, which faces increased competition in the streaming music space. Competitors include Spotify, Rdio and the recently launched iTunes Radio from Apple.

Pandora stock has performed strongly this year, nearly tripling in value since hitting $9.49 at the start of 2013.

Meanwhile, Zynga stock is down 2% as another social gaming company gets ready to make its Wall Street debut.

King.com, best known for the hit mobile game Candy Crush Saga, quietly filed paperwork with the Securities and Exchange Commission to kick off an initial public offering. The game draws 250 million monthly active players.

Follow Brett Molina on Twitter: @bam923.