The efficiency of equity-linked compensation: Understanding the full cost of awarding executive stock options

To properly align incentives using equity-linked compensation, the firm managers must be exposed to firm-specific risks, but this concentrated exposure prevents optimal portfolio diversification. Because undiversified managers are exposed to the firm total risk, but rewarded (through expected returns) for only the systematic portion of that risk, managers will value stock or option-based compensation at less than its market value. This paper derives a method to measure this deadweight cost, which empirically can be quite large: managers at the average NYSE firm who have their entire wealth invested in the firm value their options at 70% of their market value, while undiversified managers at rapidly growing, entrepreneurially-based firms, such as Internet-based firms, value their option-based compensation at only, 53% of its cost to the firm. These estimates prompt questions of whether compensation plans in such firms are weighted too heavily towards incentive-alignment to be cost effective.