AMD shares fell Tuesday after Microsoft said the chipmaker's fixes were causing some PCs to freeze. The computer maker halted rolling out the patches, which were a response to the Meltdown attack disclosed last week.
And Target raises its forecast for holiday quarter sales, sending shares to 52-week highs. The discount retailer said results for its full fiscal year would be better than originally expected.
But the holidays weren't happy for everyone. Urban Outfitters saw its shares plunge after forecasting a weaker than expected fourth quarter. And Under Armour got a downgrade from a top analyst, sending the stock down about 5 percent.
The largest South American airline altered its travel policy because Taylor Swift was supposed to perform in Argentina's capital on Friday but moved the date to Sunday because of inclement weather.
Big Business This Week is a guided tour through the biggest market stories of the week, from winning stocks to brutal dips to the facts and forecasts generating buzz on Wall Street.
