Sears' explosive rally is confounding Wall Street

When Sears announced Friday that its fourth-quarter sales have tanked, the company also promised investors that it has a plan to cut costs that will return it to profitability. 
Investors seemed only to focus on the good news. The shares soared 25% — one of the biggest one-day gains in the stock's history. 
But the move also prompted some head scratching among Wall Street money managers, industry experts, and analysts.After all, some of the measures Sears touted — specifica