Big drop: Wal-Mart Stores Inc. shares dropped 10 percent Wednesday, to $60.03 after the retailer warned that higher wages, as well as spending on e-commerce and lower prices would cut earnings per share as much as 12 percent next fiscal year. The stock drop was the steepest one-day decline in the company's shares in 25 years. Wal-Mart shares closed Friday at $58.89.

Playtime again: Mattel climbed 6 percent Friday, to $23.89 after Oppenheimer published a research note highlighting the toymaker's core brands as a bright spot. The report came a day after Mattel reported ­disappointing third-quarter results.

Surpassed expectations: Industrial conglomerate General Electric reported a decline in third-quarter profits, but strong performances from its core units helped the company top Wall Street expectations. The stock rose 3 percent Friday, to $28.98

Shrug: Netflix slumped 8.2 percent Thursday, to $101.21 after it reported slow user growth that it blamed on the introduction of chip credit cards that interfered with processing of cards for some membership renewals. Its shares closed Friday at $98.99.

Upbeat: Citigroup climbed 3.3 percent Thursday, to $52.42 after it reported that earnings jumped in the third quarter as the bank continued to cut expenses and clean up its books in the wake of the financial ­crisis. Its shares closed the week at $52.69.

Losing altitude: Spirit Airlines shares dropped 15 percent, to $42.38 Friday after its stock was downgraded at Morgan Stanley following guidance from the carrier that it expects a bigger decline in unit revenue in the fourth quarter than it saw in the ­previous quarter.

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