Quinton Mathews, the managing member of QKM research, runs through his thesis on the best time to short single stocks. To avoid the pain of momentum trading going against you as a short-seller, Mathews suggests waiting until the stock breaks lower before initiating a position.  Mathews runs through the shocking math behind this strategy. Although you may miss the initial profitability, you end up catching the big move when some of these fraudulent stocks go to zero.  As a case study for this, Mathews walks the viewer through his short in Inogen (INGN). Mathews finishes with his thesis on what time is best in the economic cycle to short stocks.