Think of Ivan Boesky, whose cooperation led to the downfall of Drexel, Burnham, Lambert.

FORBES: Why do people have a negative view of cooperators?

Or Dennis Levine, who passed insider information to Ivan Boesky, and then cooperated against Boesky.

FORBES: Why do people have a negative view of cooperators?

Ivan Boesky used to say that he was a pure arbitrageur when of course he was really insider trading.

FORBES: Kweku Adoboli: How Did He Lose UBS $2 Billion?

Robert Khuzami, who is stepping down as enforcement chief, brought insider-trading cases that hearkened back to the 1980s and Ivan Boesky.

WSJ: Writing on the Wall: What Can Help Restore Investor Trust? Maybe the SEC

The larger-than-life character is a walking, talking embodiment of 1980s avarice and corporate malfeasance, a surrogate for real-life villains like corporate raider Ivan Boesky.

FORBES: Magazine Article

Regulators came out swinging Thursday, announcing what they billed as one of the biggest insider trading cases since the Ivan Boesky scandal of the late-1980s.

FORBES: Magazine Article

Such associations are astonishing for this tough, Brooklyn-born prosecutor who nailed gangsters like Paul Castellano and white-collar felons like Marc Rich, Ivan Boesky and Michael Milken.

FORBES: As a businessman, he's been mixing with a sketchier crowd.

While arbitrager Ivan Boesky was well-known at the time of his guilty plea in the 1980s, he wasn't as deeply embedded in American corporations as Mr. Gupta, who advised many high-profile chief executives.

WSJ: Gupta Found Guilty of Insider Trading

He dealth with some nasty characters, like Ivan Boesky and Victor Posner and Meshulam Riklis, but from his trading desk in Beverly Hills he also raised billions of dollars for Turner Broadcasting, MCI, Time Warner, Medco, McCaw Cellular and Rupert Murdoch's enterprises.

FORBES: Dow Jones Interactive