Shares of Tessco (TESS -20.7%) sink after the company warns that it will earn less in 2013 after...

|By:, SA News Editor

Shares of Tessco (TESS -20.7%) sink after the company warns that it will earn less in 2013 after losing a sizable portion of its business with one of its largest wireless customers (possibly AT&T). Even with the steep selloff, shares are up 40.4% YTD as they now trade with a stepped-up yield of 3.70%.