The day after the evening that Sears Holdings voluntarily filed for Chap 11 restructuring, the stock was up big intraday (it peaked at about 140%, before pulling back but still ended the day in the green). I know that the move was counter-intuitive, but it is also quite common. I don't expect Rite Aid (RAD) to file for bk any time soon (especially with the massive cost cutting that they recently announced), but even if they did I would not be surprised if the stock moved up (albeit briefly) after such an announcement.