How Low Can the Market Really Go?

Here's a really good analysis at Business Insider using Robert Shiller's PE methods on the SP500, and a look at recent bubbles and troughs in the market:
How Low Can the Market Go?

We're now at 700 on the S&P as of today - Shiller projects the potential lows at 35% from here if it falls to the last low's peak (S&P 450 range), but down 55% if it falls to the last low's bottom (S&P 300 range).

Good site, good analysis.