Walmart (WMT) shares are on the rise after reporting fourth-quarter results that topped analyst estimates. The retail giant also announced it was buying TV maker Vizio (VZIO) in a $2.3 billion deal aimed at boosting its advertising business. American Airlines (AAL) is making some changes, including raising checked bag fees. Customers who are checking bags at the airport will have to pay $40 instead of $30 and $35 instead of $30 for bags checked online. Trending tickers on Yahoo Finance include Nvidia (NVDA), Super Micro Computer (SMCI), and Advanced Micro Devices (AMD).

Top guests on Yahoo Finance Live today include:
3:10 p.m. ET - Jay Hatfield, Infrastructure Capital Advisors CEO
3:25 p.m. ET - Max Rakhlenko, TD Cowen Director, Retail & Luxury
3:35 p.m. ET - Al Root, Barron's Senior Writer