John C. Cox, Stephen A. Ross, and Mark Rubinstein.

Closely following the derivation of Black and Scholes, John Cox, Stephen Ross and Mark Rubinstein developed the original version of the binomial options pricing model.

LEAD: An article last Sunday about portfolio insurance misstated the current affiliations of Hayne Leland and Mark Rubinstein.

But Mark Rubinstein, a senior vice president at Chum Television Channels, said that the new format offered the best possibilities for future business growth.

Mr. Bernstein quotes Mark Rubinstein, a partner of Mr. Leland, as denying that portfolio insurance was the problem.

The technique, invented by Hayne Leland and Mark Rubinstein in 1976, is often associated with the October 19th, 1987 stock market crash.

The work has been influential since its publication; Mark Rubinstein describes it as an "insufficiently appreciated classic".

Mark Rubinstein - a noted financial engineer and International Association of Financial Engineers Man of The Year in 1995.

He has helped start the careers of many current West End theatre producers, including Mark Rubinstein and Marc Sinden.

Mark Rubinstein, a leading financial economist and financial engineer.