Walmart is one of the most mentioned companies in the U.S. across all news items in the last 12 hours, according to Factiva data. Walmart reported fiscal fourth-quarter profit that beat expectations, and announced an agreement to buy Vizio Holding in a deal valued at $2.3 billion. Net income for the quarter to Jan. 31 fell to $5.49 billion, or $2.03 a share, from $6.28 billion, or $2.32 a share, in the same period a year ago. Excluding nonrecurring items, adjusted earnings per share of $1.80 beat the FactSet consensus of $1.64. Dow Jones & Co. owns Factiva.