ToplineWalmart stock rallied to a record high Thursday as the U.S.’ largest physical retailer’s latest earnings report impressed Wall Street, and left reason for optimism as the U.S. economy deals with teetering public perception.Walmart stock is set for its best day in more than four years. UCG/Universal Images Group via Getty Images Key FactsShares of Walmart rose more than 8% to about $74.50 in premarket trading, well above the prior all-time high of $71.33 achieved last month and pacing toward its best ...