Before the crash, corporations had leftover money and used them for corporate buybacks as well as the fed started buying stock as well as the fed printing money like nothing, increasing the demand and decreasing the supply. And in economics, increased demand and decreased supply make the price level skyrocket. HOWEVER, in order for these corporations to continue their business, they will have to start selling their stocks for liquidity, increasing supply (decreasing price). This, as well as M2 money velocity collapsing, will begin having a larger effect on money supply months after a decline (right about now).