ConsumerShares of Pinnacle Airlines (PNCL -6.5%) stumble hard after taking on a harsh downgrade from...Dec. 12, 2011 9:47 AM ETPinnacle Airlines Corp. (PNCLQ) StockPNCLQBy: Clark Schultz, SA News EditorShares 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.Recommended For YouMore Trending NewsSee More »Related StocksSymbolLast Price% ChgPNCLQ--Pinnacle Airlines Corp.Trending AnalysisTrending News