Kohl's shares plunged as much as 25% on Thursday after the retailer reported a surprise first-quarter loss and lowered its forecast for the year. The department store chain saw a 5.3% drop in net sales for the fiscal quarter ending May 4, and comparable sales were down 4.4%. The company said lower clearance sales versus last year amounted to a 600-basis-point drag on comparable sales. "Our first quarter results did not meet our expectations and are not reflective of the direction we are heading with our str ...