Key Takeaways Walmart launches a Premium Musical Instrument Shop on its Marketplace.The storefront features brands like Fender, Roland, Boss and Zildjian.WMT's Marketplace drives 28% U.S. e-commerce growth and supports ad revenues.Walmart Inc. (WMT) continues to sharpen the strategic edge of its third-party Marketplace by expanding into higher-value, specialized categories, with the launch of a Premium Musical Instrument Shop. While musical instruments represent a relatively small category, the move reflect ...