Why is Trump telling Walmart to eat tariffs? How will Moody's US downgrade affect markets? What impact do Trump’s Middle East AI deals have? Why is Nvidia hiking AI chip prices now? How did Walmart justify raising prices due to tariffs? What caused Kroger to overcharge on discounted items? Why are US Treasury securities attracting foreign buyers? What explains the S&P 500’s recent recovery? How is China’s Gen Z fueling a stock boom?