NVIDIA shares pulled back sharply from a 52-week high close of $216.61 on April 27 to $199.57 by April 30, as trader consensus shifted following Alphabet and Amazon quarterly earnings that underscored accelerated in-house AI chip development—Google's latest TPUs and Amazon's Trainium chips—potentially eroding Nvidia's data center dominance despite its 73% year-over-year revenue surge to $68.1 billion in Q4 fiscal 2026. Elevated trailing P/E of 40.7 reflects stretched valuations amid AI hype, with forward P/E at 24.6 incorporating analyst estimates for continued GPU demand. Q1 fiscal 2027 earnings on May 20 loom as the next catalyst, alongside broader semiconductor volatility and Treasury yield movements influencing risk appetite.