Ah, the stock market. A bastion of rational thought, predictable trends, and calm, measured responses to geopolitical shifts. Or, if you’ve been paying attention to the last few years, a chaotic pinball machine where every presidential tweet or off-the-cuff remark sends billions ricocheting. And with Donald J. Trump back in the driver’s seat of policy announcements, investors are once again strapping in for a ride that promises more twists than a pretzel factory.The latest flurry of pronouncements from the ...