From the first of four public stock offerings in 1923 (shares are nontransferable) through the Vince Lombardi era to last year's Super Bowl win, the team has crafted deep ties to their followers.

FORBES: Magazine Article

There is reasonable concern that current methods of option pricing, both the Black-Scholes and binomial models, are not appropriate for determining the cost of the nontransferable, long-term options that companies issue to employees.

FORBES: AIG Chokes On Options Remedy