Short Selling

There’s an old Wall Street adage: “Don’t short valuation.” So, is everything else fair game? What about frauds, are those sure things? The purpose of this class is to answer these questions and equip students to profitably employ short-selling investment strategies. We will introduce students to all aspects of short-selling. However, we will assume that students have prior knowledge of the basics mechanics of shorting a stock, as well as various accounting tricks and “shenanigans” that companies employ to mask weaknesses in their business. To that end, we will provide some materials that should be reviewed before the start of class to review these concepts. In class, we will first dig into the academic literature behind short selling. We will discuss what has worked historically, and whether or not it has been successful as of late. We will then read and discuss case studies on “famous” shorts and frauds. We will, with the benefit of hindsight, try to identify inflection points in the arc of each company. The students will also become familiar with the risks of shorting frauds too early. We will examine various short selling strategies, including “activist shorting”, that are currently being employed in the markets. We will evaluate what elements make for a compelling short “pitch.” Additionally, students will learn about idea sourcing, portfolio management, risk management, and compliance. While the title and focus of the class is “Short Selling,” it is important to note that the techniques and investment approaches we will discuss are highly applicable to long-focused investing as well. Deciding not to own a security that is included in a tracking index is functionally the same as shorting the security, and understanding a company’s true profitability (and not the version that it promotes through its accounting decisions) is highly important for valuation efforts. A deep and skeptical research approach should assist fundamental analysts in all fields. We will approach this topic from both theoretical and practical perspectives, drawing heavily on the academic literature around short selling as well as highly-experienced practitioners. We will examine what makes a profitable short, and pay particular attention to unsuccessful shorts and how to avoid them. The mosaic of analysis will include accounting, market microstructure, fundamental factors, behavioral finance, value-added research, and various valuation approaches.