Someone correct me if I am wrong...The people that sold their shares after b/k are entitled to nothing. And if they were entitled to something, it would be who is at fault to reimburse them for their losses. FDIC and perhaps JPM. Any stock is a gamble and that is a risk that everyone was willing to take.
those that bought AFTER the BK, bought this as a gamble that they could sell at a higher price once all is settled.
those that held BEFORE the BK are so called investors that have a valid claim since they held shares that were in good standing and value based before the BK.
the only entitlement that post-shareholders have is current market value with no compensation.