Generally, the law calculates your losses by deducting from the amount that you paid for shares that you purchased during the class period the amount that you sold those shares. If you have not sold all the shares that you purchased during the class period within three months following the end of the class period, then the law calculates your loss on those remaining shares by deducting the weighted average market price of the stock in the three month period following the end of the class period from the price that you paid for those shares.
