Michael Nagle / Bloomberg via Getty Images Stocks are back to making dramatic moves after a long upward run. Key Takeaways The major U.S. stock indexes are back to making dramatic moves, with investors dealing with another round of trade-related uncertainty. One widely used volatility measure, the VIX, has jumped recently to its highest levels in months. But it's still well off April highs. Investors are getting a taste of volatility. We're not back where we were in April—but the increase is notabl ...