Pandora (P +9.9%) is staring at huge gains on a down day. The fact Apple's event came and went...

|About: Pandora Media (P)|By:, SA News Editor

Pandora (P +9.9%) is staring at huge gains on a down day. The fact Apple's event came and went without the launch of an Internet radio service could be helping, but shares were already up strongly before the event. 53.1% of Pandora's float was shorted as of Sep. 28, which means it doesn't take much to stoke a short-covering rally.