Shopping around: Sluggish holiday season results from department store operator Nordstrom disappointed Wall Street, sending the company's stock tumbling 7 percent Friday, to $49.17. The retailer said late Thursday that discounting hurt profits and pledged to trim spending by $300 million over the next five years.

Big Blue bounce: IBM climbed 5 percent, to $132.80, Thursday after the company said it will buy Truven Health analytics for $2.6 billion, expanding the health care capabilities of its Watson cognitive computing system. IBM closed the week at $133.08.

Another deal: Logistics company Ingram Micro surged 21.4 percent, to $35.99, Thursday after it agreed to be bought by Chinese shipping company Tianjin Tianhai. The deal values Ingram about $6 billion, or $38.90 per share. Ingram shares closed the week at $36.31.

Locked up: Home security services company ADT surged 50 percent, to $40.40, Tuesday after it accepted an offer from investment company Apollo Global Management worth $42 per share, or $6.94 billion. ADT shares closed the week at $40.

Groupon rockets: Online deals site Groupon gained 34.6 percent, to $3.90, Tuesday after Chinese e-commerce site Alibaba disclosed it had taken a 5.6 percent stake in the company. Groupon stock has been in a big slump over the last year. Its shares closed Friday at $4.09.

TransUnion climbs: Credit rating company TransUnion jumped 18 percent, to $25.30, Wednesday after its fourth-quarter results were better than expected and its outlook for 2016 was also stronger than analysts anticipated. TransUnion shares ended the week at $25.30.

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