Quote from gnome:
I've been using $56 from an SP spreadsheet. That number is a bit old... the most recent number I can find currently (Oct 29, 2008) is "$48.52, 12-month as reported earnings"... With the SP @ 873, that's still 18x earnings.
So, if earnings drop further... and the P/E multiple declines into the "value range" of "10x or less", the market is going much, MUCH lower.
Yes, spx headed four 575.