The following are based on S&P 500 12-month trailing earnings as of Q4 2002 (Source: Standard & Poors). The estimated P/E is calculated by dividing the most recent S&P 500 close by the EPS:
"As Reported" (GAAP) EPS is $28.00; P/E is 31.39. "Core" EPS is $23.75; P/E is 37.00. "Pro Forma" EPS is $45.98; P/E is 19.11.
Based upon the latest GAAP earnings the following would be the approximate S&P 500 values at the cardinal points of the normal historical value range. They are calculated simply by multiplying the GAAP EPS by 10, 15, and 20: