Positive earnings lifted Yum! Brands ( YUM) amid Monday's thinly traded after-hours session. The Louisville, Ky., company, which operates KFC, Pizza Hut and Taco Bell, among others, reported a profit of $270 million, or 50 cents a share, compared with 42 cents a share last year. Analysts polled by Thomson Financial were looking for 45 cents a share, excluding extraordinary items. Sales totaled a better-than-expected $2.56 billion. Yum! shares climbed $1.26, or 3.5%, to $37.55 in recent extended trading. Sprint Nextel ( S) was another late winner, after announcing that chairman and CEO Gary Forsee is resigning , effective immediately. CFO Paul Saleh will replace him in the interim, and board member James Hance Jr. was appointed acting non-executive chairman. Shares of the Reston, Va.-based wireless-communications giant rose 2.7% to $19. Elsewhere, Standard & Poor's added Expeditors International ( EXPD) to the S&P 500 index as of the market's close Tuesday. Iowa's Terra Industries ( TRA), which makes nitrogen and methanol products for agricultural and industrial markets, was added to the S&P MidCap 400. Seattle-based Expeditors tacked on 3.2% at $51.50. Terra shares gained 4.9% to $30.89 in heavy trading. Microchip Technology ( MCHP) slid, however, after the chipmaker pegged non-GAAP, fiscal second-quarter income at about 38 cents a share. That beats the Street's 36-cent consensus, though it's a penny below prior guidance. Sales should be between $258 million and $259 million to trail the prior outlook, as well as analysts' estimates. Shares of the Chandler, Ariz. company sank $1.70, or 4.6%, to $34.92.