In Martin Scorsese’s new film, “The Wolf of Wall Street,” it is not hard to tell when Jordan Belfort, the high-finance hustler of the 1990s, played by Leonardo DiCaprio, has officially made it on Wall Street: His suits go from billowy, double-breasted, off-the-rack numbers to lordly pinstripes, complete with a chunky gold Rolex watch, Gucci loafers and a giant red silk tie.

Ah, for the days when greed was good.

Throughout the go-go “Wolf” years on Wall Street, the Gordon Gekko definition of a power suit — think blue pinstripes, shoulder pads, wide lapels and a red or yellow power tie — held a particular grip on the psyche of young men like Mr. Belfort (those who shared his ambition, anyway, if not his contempt for the law).

Caught up in the testosterone-soaked frenzy of a bull market, would-be masters of the universe found that the power suit not only provided the psychological armor it took to survive the trading trenches, but signaled, through its sheer gangster-ish cockiness, one’s intention to scrape his way to the top by any means necessary. (Yes, this was a boys’ club.)

Today, the Dow is once again soaring. But on a more sober, post-financial-crisis Wall Street, bankers and clothiers said, the dress code for men has steered away from Gekko-style displays of conspicuous sartorial consumption.