In that respect, in this election, Wall Street is a lot like a swing state. Trump’s promises to cut taxes and reduce regulation would be a boon for financial firms, and those promises have helped him rebuild the coalition of high-powered donors and financiers who supported him through his first term.

To pollsters, the race for the White House is a toss up. But WSJ reporter Caitlin McCabe explains that a potential shift in momentum is visible in markets as some large hedge funds and money managers get into position to profit from a Trump victory.