Almost daily, investors email or call me with a single question, “how much of my loss in a stock is included in a pending securities fraud class action?” It appears at first blush to be a straightforward question. Like many simple questions, we lawyers have completely muddied the waters turning this into a complex area of the law. This blog article then is the first of four blog articles that will address the issue of how to measure damages in a securities fraud lawsuit. In this article, I introduce and explain two of the simpler examples dealing with purchases made within the class period and sales either during the class period or the day after the class period. I will endeavor to use real time examples in each article.