April was not the cruelest month for investors—although the tariffmageddon-obsessed naysayers may be smarting. Despite a month of wild swings and gloomy forecasts, U.S. stock markets ended April nearly flat, brushing off predictions that Trump’s trade policies would trigger a historic collapse. The S&P 500 finished the month down just 0.8 percent. The Dow dropped 2.1 percent, and the Nasdaq edged lower by 0.3 percent. That mild performance stood in stark contrast to a mid-April Wall Street Journal article that warned of a “Trump rout” and suggested the Dow was on track for its worst April since 1932. It wasn’t....