One Wall Street analyst isn't buying management's turnaround plan.Shares of donut maker Krispy Kreme (DNUT -3.62%) fell on Wednesday, down as much as 10.2%, before reverting to a 3.6% decline on the day.Krispy Kreme has had a tough 2025, which has seen the stock plunge 64% on the year. Tepid sales, falling profits, and the cancellation of a high-profile partnership with McDonald's have all been headwinds for the company.Today, a Wall Street analyst piled on, lowering his rating on the stock from neutral to ...