The following video is from Tuesday's Investor Beat, in which host Chris Hill and analysts Jason Moser and Matt Koppenheffer dissect the hardest-hitting investing stories of the day.

Shares of Pandora have fallen more than 12% this week on the news that Apple is gearing up to launch a music streaming service. In this installment of Investor Beat, Jason and Matt discuss how big a threat Apple poses to Pandora, what the "first-mover advantage" is really worth, and whether Pandora has a puncher's chance against what is about to be the new 800-pound gorilla in the music streaming industry. We also look at four stocks that made big moves on Tuesday's market, and two stocks we'll be watching closely this week.

Chris Hill, Jason Moser, and Matt Koppenheffer have no position in any stocks mentioned. The Motley Fool recommends Apple and salesforce.com and owns shares of Apple and IBM. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.