Look at CLF which is losing more than 2x the money that BTU is. Nice up day in it. When you have a main institution short a stock the other folks leave them alone until they can get theirs covered. No it isn't collusion, it is just that JPM or GS can destroy you in the next trade so you better let the bullies have their way. BTU is probably best of breed in coal stocks. Look what these guys did to Lehman when it was determined that they would be the sacrificial lamb. This is not any different then spying on the public or the QE action.