SA analyst upgrades/downgrades: TSLA, NVDA, BBBY, WDC

This analyst roundup highlights mixed stock-specific calls. Nvidia was upgraded to Buy on the view that its AI platform is expanding beyond chips into networking, software, and enterprise AI, which strengthens its competitive moat and makes the recent pullback look attractive. Tesla also received an upgrade, with analysts citing improving top-line growth. In contrast, Western Digital was downgraded after a strong rally because the market may have already priced in the value from its HDD/SSD split, while future revenue could soften as memory pricing normalizes. Bed Bath & Beyond was also downgraded, with concerns that its turnaround under CEO Marcus Lemonis is highly speculative and faces execution risk. Overall, the piece is more about analyst sentiment and valuation than new company fundamentals, but it underscores continued divergence in tech and turnaround names.