Wall Street’s Titans Can’t Wait for Trump 2.0

The day after the presidential election, JPMorgan Chase’s chief executive, Jamie Dimon, picked up his phone for a call he had hoped not to make.

Mr. Dimon, who had privately supported Vice President Kamala Harris and boasted to associates he hadn’t spoken to Donald J. Trump in years, was now in the position of calling the president-elect with congratulations and an offer to help in any way. Mr. Trump didn’t pick up, forcing Mr. Dimon to leave a message on his voice mail, according to two people with knowledge of the call.

The snub — and a subsequent missive from Mr. Trump on social media that Mr. Dimon would “not be invited” to be a part of his administration — did not dampen the banker’s enthusiasm. Mr. Dimon said a few days later that his industry was “dancing in the street” over Mr. Trump’s win and incoming Republican majorities in the House of Representatives and Senate.

These days, it seems that everyone who is anybody on Wall Street — to say nothing of a whole lot of nobodies — is amped up for Mr. Trump’s return to the Oval Office. In interviews, bankers, lawyers, investors and corporate executives with a wide range of political views said that despite mixed opinions on Mr. Trump’s proposed policies overall, they see in his administration the greatest possibility for a boon to the business world in a generation or more.

In part, they’ve been won over by the president-elect’s picks of a fairly run-of-the-mill collection of Republican stalwarts for economic and financial regulatory roles. They expect this Wall Street-heavy crowd, such as Paul Atkins, a longtime lawyer for investment firms who is Mr. Trump’s pick for Securities and Exchange chairman, and Howard Lutnick, a billionaire investment banker as the commerce secretary designate, to focus on rote conservative causes like lighter financial regulation and lower taxes (or at least a continuation of tax cuts set to expire).

Notably, the rosy outlook sidesteps some of the nonconformist economic ideas — namely tariffs on all imports to the United States — that Mr. Trump has pledged. It also takes as a given that the president-elect will continue to save his most provocative political picks for bureaucracies such as the F.B.I. that financiers see as unrelated to their world.