Market analysis current as of the July 20, 2026 U.S. close. The AI stock market bubble is being tested from two directions at once. China’s increasingly capable and inexpensive open-weight AI models are challenging the premium pricing of U.S. platforms, while American technology companies are committing extraordinary sums to data centers, processors, electricity and … [Read more...] about Is a Top Forming in the AI Stock Market Bubble? China’s Open-Source Challenge and Nasdaq Risk