This is an Annual Trend Volatility of Historic Enterprise Value over 10 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 fiscal year intervals. Historic Enterprise Value represents Market Capitalization minus Cash and Equivalents plus Total Debt, Minority Interest and Preferred Stock.