This is an Interim Trend Volatility of Operating Profit over 5 years. Trend Volatility is derived by subtract the log linear Estimated index value (in index value units) from the Actual index value and divide by the Estimated index value to derive a % deviation. Repeat this for each observation and average the .absolute. results to derive a % Mean Absolute Deviation. Express this result as a percentage. Required 11 latest semi-annual or 21 latest quarterly periods. Operating Profit represents the sum of: Total Revenue and Total Operating Expense. NOTE: This value is only available for Industrial, Utility and Insurance companies.