The P/E Ratio for each of the past 60 months is calculated using the month end Price divided by the trailing twelve month Earnings Per Share (EPS) Excluding Extraordinary Items ending at least 1 month earlier than the pricing date. The highest of these 60 P/E values is the 5 Year High Price Earnings Ratio. NOTE: If a trailing twelve month EPS value is less than or equal to zero, the corresponding month's P/E ratios are assigned an NM value. If there are less than 40 positive P/E values, then the 5 Year High P/E is assigned an NM.