Tough sale: Department store operator Nordstrom's shares dropped 15 percent, to $53.96 Friday after the retailer reported an earnings decline and cut its guidance amid concern that store traffic is falling short of expectations.

Soft sales: Macy's shares dropped 14 percent, to $40.56 Wednesday after it reported lower than expected third-quarter sales and cut its profit forecast for the year. The retailer also said it would not form a real estate investment trust for its properties. Macy's shares finished the week at $39.10.

Bad trip: Travel site Priceline fell 10 percent Monday to $1,311.15 after the company's outlook for the fourth quarter, a typically strong period for travel companies, came up short of analysts' expectations. Airbnb's effect on hotel bookings is a key issue. Priceline shares closed the week at $1,297.75.

Shorted: Drugmaker Mallinckrodt fell 17 percent, to $58.01 Monday after the short-selling firm Citron Research warned that the company might have reimbursement problems similar to Valeant Pharmaceuticals. Mallinckrodt shares closed the week at $56.94.

Earnings: Gap plunged 5.1 percent, to $26.27 Tuesday after the company posted disappointing results for October particularly at its Banana Republic stores, which it said would affect quarterly results. Gap shares closed the week at $25.23.

Strong results: Homebuilder D.R. Horton rose 5 percent, to $30.11 after reporting a 44 percent increase in fiscal fourth-quarter profits that surpassed analyst estimates. The company also said orders were up 19 percent. D.R. Horton shares closed the week at $30.67.

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