Amazon ( AMZN ) shares climbed more than 3% on Thursday, making it one of the S&P 500’s strongest performers, after a string of positive developments reinforced confidence in its growth story. A major catalyst came from Anthropic, the artificial intelligence startup backed by Amazon, which just closed a $13 billion funding round at a stunning $183 billion valuation. Amazon holds an estimated 15–19% stake in Anthropic and is already benefiting from its rapid rise. Analysts say Anthropic could spend as much as $5 billion on Amazon Web Services (AWS) in 2026, helping to reaccelerate growth at Amazon’s most profitable business unit. AWS, which generates roughly 60% of the company’s operating profits, has faced stiff competition from Microsoft Azure ( MSFT ) and Google Cloud ( GOOG ). But investors are now warming to what some call an “AWS AI Resurgence,” with forecasts suggesting AWS could return to growth above 20% annually by late 2025. The partnership is strategic beyond financi...