Morning Market Losers

Mediabistro MBIS dropped 33.88% to $0.86. Mediabistro's 52-week trading range is $0.80-$5.25. Orchard Supply Hardware Stores OSH dropped 15.59% to $1.78. Lowe's LOW offered to buy Orchard Supply Hardware Stores for around $205 million in cash. MannKind MNKD plummeted 15.49% to $6.37. MannKind's trailing-twelve-month ROA is -38.30%. PostRock Energy PSTR dropped 10.88% to $1.31. PostRock Energy shares have dropped 14.53% over the past 52 weeks, while the S&P 500 index has gained 20.70% in the same period.