Dow Jones Industrial Average: Dropped 703 points to 52,759 on Thursday after U.S. debt crossed $40 trillion, spiking the 30-year yield to 5.25%. S&P 500: Closed at 7,641, down 0.9% on the week, snapping a three-week winning streak as Treasury yields surged. Nasdaq Composite: Fell to 26,067, down 1.0%, as rising yields pressured growth stocks. Walmart (WMT): Suffered its biggest one-day drop in years after...