Sears keeps pruning its business in a years-long makeover, a bid to transform itself from a 123-year-old retail store into a nimble, 21st century operator.<br />Patience appears to be wearing thin.<br />Shares slid early Tuesday to 13-year lows after the company said it would accelerate the closure of some of its stores following a "challenging" holiday season.<br />The company's stock is down 20 percent this year, and they've been cut in half in the past 12 months.<br />"The holiday selling season proved to be challenging, with historically warm weather and intense competition pressuring margins and driving comparable store-sales declines," the company said in a printed statement Tuesday.
