Walmart Inc (NYSE:WMT) is gearing up for its first-quarter earnings report, due out before the open tomorrow, May 16. When we last covered the blue-chip, big box retailer, it saw an uptick in bullish options activity after a 3-for-1 stock split and new store plans. In the time since, WMT hit a record high of $61.66, and was last seen 0.2$59.76.Options traders are pricing in a 5.9% swing for Walmart stock following the earnings event, which is slightly higher than the ...