Holiday blues: Macy's shares dropped nearly 18 percent to $25.78 Thursday after the department store lowered its full-year guidance, citing lower than expected holiday sales as strong early results faded in mid-December. The stock closed Friday at $25.42.

Builder bounce: Lennar jumped 7.1 percent to $45.92 Wednesday after its CEO said more potential buyers have been coming to its model homes recently as mortgage rates dipped. The company added it isn't ready to give forecasts about its performance in 2019 because of "continued softness and uncertainty." Shares closed Friday at $46.41.

All the livelong day: Union Pacific surged 8.5 percent to $150.25 Tuesday after it hired longtime Canadian National railroad executive Jim Vena as its chief operating officer. The shares closed Friday at $153.21.

Bottoms up: Constellation Brands slumped 11.2 percent to $153.08 Wednesday after it cut its annual profit forecast, saying it now expects sales and profits for its wine and spirits division to fall in the current fiscal year. It also wrote down its $4 billion investment in Canadian marijuana producer Canopy Growth by $164 million. Shares closed Friday at $159.21.

Strong demand: Verizon added 2.7 percent to $58.24 Wednesday after it reported strong subscriber gains in the fourth quarter. The stock closed the week at $58.02.

Popular advice: Dollar Tree jumped 5.8 percent to $98.35 Monday after an activist investor said the company should consider selling its Family Dollar business. The shares closed at $97.28 Friday.

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