The fast-casual salad chain is still expanding at a healthy rate. Sweetgreen (SG 7.39%) has taken its investors on a wild ride since its IPO on Nov. 18, 2021. The fast-casual restaurant chain went public at $28, and it started trading at $52 before closing at a record high of $53 the following day. At the time, the market was dazzled by its rapid growth. The buying frenzy in growth stocks amplified those gains. But by March 27, 2023, Sweetgreen's stock had sunk to its all-time low of $6.31. The bulls retrea ...