Why are US stocks near record highs again? How will Walmart's price hikes affect consumers? What caused Moody's to downgrade US credit rating? Why is Trump attacking Walmart over tariffs? How will Charter's buyout of Cox impact cable industry? What are implications of NJ Transit rail strike? Why did MIT disavow AI productivity paper? How are AI and robotics stocks poised to perform? What effect does Trump’s Middle East trip have on trade?