The hackneyed news media deadlines are trotted out again: "x billion wiped off shares". How quickly we forget.
Below are the charts for the FTSE and the Dow from their recent low points in March 2009:

The FTSE closed Friday 49.4% higher than 29 months ago; the Dow, 74.8% higher.
I think that ultimately, both will (in real terms) plumb depths significantly deeper than they did in 2009, but it will not happen in one go, and it will take a long time.
The stockmarket is not a store of money: A has already paid B for ownership of the shares, and the money went into B's bank account. The money is not parked on Wall Street or Paternoster Square, it merely passes through it.
On the way, it's purchased either the promise of a future income stream (and how reasonable is that hope in an unravelling world economy?) or the chance to sell on to a bigger fool (in the hope that it hasn't already happened).
Remember, you don't have to be in this game. I should like to know where the traders' and bankers' bonuses are invested at the moment: do they eat where they cook?
INVESTMENT DISCLOSURE: None. Still in cash (and index-linked National Savings Certificates), and missing all those day-trading opportunities.
DISCLAIMER: Nothing here should be taken as personal advice, financial or otherwise. No liability is accepted for third-party content, whether incorporated in or linked to this blog.