Should you buy Walmart stock after its 9% post-earnings drop?

Walmart shares tumbled more than 9% on Thursday after the retailer reported weaker-than-expected US comparable sales, raising questions over whether the selloff has created an attractive entry point for investors even as debate over the stock's valuation continues. The selloff came despite Walmart beating Wall Street estimates for both revenue and adjusted earnings and raising its full-year financial forecasts. Walmart reported quarterly revenue of $187.9 billion, up nearly 6% from a year earlier and above the roughly $186 billion expected by analysts, according to Bloomberg consensus data. Adjusted earnings per share came in at 81 cents, compared with expectations of 74 cents. But investors focused on the company's US comparable sales, which rose 2.6%, well below the 3.8% increase expected...