Vizio televisions are displayed at a store in San Rafael, California, on Feb. 13, 2024.Justin Sullivan | Getty ImagesWalmart has agreed to buy TV maker Vizio, the companies announced Tuesday, as the largest U.S. retailer grows its high-profit ad business.Walmart will acquire Vizio for $2.3 billion, or $11.50 per share, in cash. The big-box retailer announced the acquisition as it reported its fourth-quarter earnings.Vizio shares, which spiked after reports of the deal first emerged last week, cl...