Bowing out: Starbucks shares slid 2 percent, to $57.21 Friday after the company said Howard Schultz will step down as CEO in April but remain chairman as President and Chief Operating Officer Kevin Johnson takes the helm. Schultz has been CEO since 2008.

Nice ring to it: Luxury jeweler Tiffany rose 8 percent to $84.23 Tuesday after the company reported stronger sales in Asia, offsetting weaker results from the U.S. and Europe. Its stock finished the week at $81.30.

Oil rush: Marathon Oil rose 21 percent to $18.08 Wednesday after OPEC members finalized a deal that will cut their oil output, the first time in eight years that the cartel has agreed to cut production. The move drove a wide range of energy stocks higher. Marathon Oil shares finished the week at $18.20.

On the newsstands: Magazine publisher Time Inc. jumped 18 percent, to $16.08 Monday after the company reportedly rejected a buyout offer that valued the company at $18 per share. Time stock closed Friday at $16.

Guess not: Clothing company Guess declined 10 percent to $13.76 Thursday after slashing its annual guidance, citing weaker sales at older stores. Its stock closed the week at $12.91.

Drive off the lot: RV maker Thor Industries surged 10.5 percent to $99.93 Tuesday after it reported a much-stronger profit and better sales than analysts expected as RV shipments are expected to climb to their highest level in nearly four decades. Thor's stock closed Friday at $101.48.

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