Almost all fundamental investors based their research, analysis and investment decisions on the assumption that some positive relationships exist over time between equity valuation and key financial metrics.
However, while a large amount of investment activity is based on the assumed relationships between the aforementioned factors, research conducted by S&P Capital IQ, shows that for the past decade it has been impossible to prove a strong statistical relationship between commonly referenced fundamental financial statistics and the direction of the equity market, momentum, and valuation:
"Whether we are looking at various measures of profit margin, reported revenue and earnings growth, or even estimated future sales and earnings growth, the past decade's correlations between price-to-earnings (P/E) valuations and a variety of commonly referenced...

