Shares of Pinnacle Airlines (PNCL -6.5%) stumble hard after taking on a harsh downgrade from...

|About: Pinnacle Airlines Corp. (PNCLQ)|By:, SA News Editor

Shares of Pinnacle Airlines (PNCL -6.5%) stumble hard after taking on a harsh downgrade from Dahlman Rose to Sell from Hold. Analysts with the firm see operational losses running through H1 2012 and say the carrier may need to restructure itself.