Starbucks (SBUX -2.30%) finished February above $115 a share -- knocking on the door of a new all-time high. But at the time of this writing, the stock is around$81 a share. That's a brutal decline in a relatively short period, especially since the major indexes have recouped much of their losses from early April tariff turmoil. Here's what investors can learn from Starbucks' struggles, and the challenges of investing in turnaround stocks. Founder and longtime CEO Howard Schultz came back as interim CEO in ...