Electrocardiographic markers of impaired left ventricular function in idiopathic dilative cardiomyopathy (DCM)

We propose a simple method to infer the forecast error associated with quarterly estimates of earnings and revenue before the firm announces realized earnings and revenue. The method uses estimates of the profit margin implied by an analyst’s forecasts of both earnings and revenue to identify forecasts that are likely to be optimistic or pessimistic. The ability to anticipate forecast error permits a trading strategy that exploits the average market reaction following positive and negative earnings and revenue surprises.