Boesky lost a bid to delay several civil suits.

A federal judge ruled that stock speculator Ivan F. Boesky cannot use his cooperation with the federal probe of Wall Street insider trading as an excuse to delay the suits against him. In a blistering, 16-page opinion, U.S. District Judge Milton Pollack said Boesky “deliberately courted the impediment he seeks to erect as a shield.” Boesky is being sued by several limited partners in his $1-billion investment partnership, including one group seeking to recover about $278 million. The federal civil suits against Boesky and companies he controlled accuse the arbitrageur of misleading nearly 40 limited partners in a 1986 offering. The suits followed the revelation late last year that Boesky had reached a $100-million settlement of Securities and Exchange Commission civil charges.