Why Walmart Stock Slumped by 3% on Wednesday

On Wednesday, Walmart (WMT -2.95%) stock was guilty by association in the eyes of the market, a dynamic reflected in a share price drop of nearly 3%.A top investment bank published a downbeat research note on a major peer in the retail world, and the bearishness spread to Walmart's stock. Overall, however, few investors were enthusiastic about any stocks, as Walmart's decline was only slightly steeper than the S&P 500's (^GSPC -2.24%) 2.2% dip.The retail sector was in the sightsBefore the market open, Goldm ...