Chart: Profit Margin of U.S. Economy. Annualized corporate profits as a percentage of GDP. (A good reason why the Graham P/E Ratio is a better valuation measure than the TTM version.)
Current value (6/30/08): 9.40%
Chart: Bond Yield over Equity Yield. 10-year treasury yield minus inverse of Graham P/E Ratio (10-year average equity earnings yield).
Current value (10/31/08): -2.4% (equities yield 2.4% more than bonds)