Fueled up: Grocery store operator Kroger gained 5 percent Friday after reporting earnings that beat analysts' expectations. Lower operating expenses and higher fuel margins were among the factors for the strong performance. Kroger's stock closed at $37.29.

No recognition: Marvell Technology fell 16 percent Friday to $8.84 after the chipmaker said it is investigating its accounting related to the recognition of certain revenue in the second quarter.

Red ink: Barnes & Noble sank 15 percent to $13.91 Wednesday after the troubled bookseller reported a wider first-quarter loss as sales of its Nook e-reader and digital books fell sharply. Its college bookstore business, which was the only unit to post an increase in sales in the quarter, was spun off last month. The stock closed Friday at $12.49.

Power deals: Teco energy surged 24 percent, to $26.10 Tuesday after Canadian energy and services company Emera said that it would buy the electric and gas utility company for about $6.5 billion. Teco's stock closed the week at $26.70.

Media frenzy: Meredith Corp. jumped 9.6 percent, to $50.37 on Tuesday after agreeing to be acquired by fellow media company Media General. Meredith owns 17 television stations and publishes magazines such as Better Homes & Gardens and Family Circle. The combined company will reach nearly one-third of TV households. Meredith closed Friday at $49.44.

Bad karma: Lululemon sank 13 percent to $55.50 a share after the high-end apparel maker predicted lower than expected profits as its margins decline. Lululemon shares finished the week at $54.01.

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