Most startups craft the value of these options by using an outside valuation consultant, but if the price of these shares spikes on SecondMarket, companies will have to weigh what value can be used.

FORBES: Names You Need to Know: Barry Silbert

Mauboussin, 36, became fascinated by real options as he attempted to explain the valuation of speculative technology companies.

FORBES: Consider Your Options

This GAAP charge was based on the Black Scholes valuation method, often maligned for being subjective and inappropriate for shares and options generally held for a long period of time.

FORBES: How GAAP Accounting Rules May Be Damaging To Investors