Pandora is gaining ground for a 6th straight day

Pandora shares are spiking Tuesday, continuing big gains over the last 6 days.  The music streaming company is scheduled to report earnings Wednesday after the closing bell. The stock is down considerably over the last year, but investors are confident ahead of earnings. Pandora is rallying Tuesday ahead of its Wednesday earnings report. The stock is up more than 4% Tuesday, a continuation of gains for six straight days. Shares are up more than 14% over the last week.   The music...