Rorschach Test For Bulls And Bears

 | Sep 29, 2013 02:35AM ET

Earlier this week John Murphy at stockcharts.com wrote about the gold/copper ratio as a measure of how Mr. Market is perceiving macro-economic sentiment and momentum:

Gold is bought in times of financial stress when stocks are in trouble. Copper is bought when economic conditions are better and stock prices are rising. The gold/copper ratio tells whether investors are optimistic or pessimistic. The fact that the ratio has been falling over the last two years suggests more optimism on the economy and stock market. A stronger global economy supports the price of copper, and diminishes the appeal of gold.

He overlaid a chart of the SPX against the gold/copper ratio. In my analysis below, I inverted the ratio to copper/gold (optimism/pessimism, in red) against a chart of the SPY (stocks) against AGG (bonds) as a measure of risk appetite (in grey):