The Dow Jones Industrial Average tumbled by more than 650 points in the biggest plunge since Donald Trump’s election, as a rout in the bond market spilled into equities. It plummeted to 25,512, falling 674 points, or 2.6 percent, as the markets finished their worst week in two years. Strong jobs data that increased the likelihood the Federal Reserve will lift rates next month sent bond bulls scurrying and rattled equity investors who haven’t seen a week this bad in two years. The selling accelerated after Dallas Fed President Robert Kaplan suggested more than three hikes may be necessary this...