This is the doctrine of the "wealth effect", and if you can dig up a few factoids and linear regressions to illustrate it and avoid using the word "shit", you can make a quite decent living as a pundit by repeating the paragraph above. On the other hand, if you had been placing bets on a US double-dip recession so far, you'd have lost them, because Alan Greenspan and his merry gang at the Fed have a solution to this problem. Basically, the solution's pretty simple and it involves screwing interest rates down to the floor until mortgage rates follow them down to Low Low Prices levels, and pointing out to the Great American Consumer that it's "Bye-Bye, Magic Stock Market Bubble Money!" but "Hello, Magic Housing Market Bubble Money!". Marvellous.
This is pretty impressive.