Hertz (HTZ) went into bankruptcy in 2020 before emerging out of it later on. During Wednesday's trading, the rental car company rallied more than 50% following news that activist investor Bill Ackman, with Pershing Square, bought a big stake. Ackman's company owns approximately 4% of Hertz. George Tsilis talks about what drove Ackman to the stock, along with the debt and competition growth headwinds it faces.