One of the worst performing IPOs of 2019 was undoubtably SmileDirectClub Inc. ($SDC). Shares hit their all-time high on their first trading day, 9/12/2019, at one point reaching $21.10 a share. Since then the shares have slid substantially, by the end of 2019 shares were down 58.6% from their all-time high. While I was uninterested in this.