Real estate or corporatestock can fall in value essentially falling out the bottom if a fire takes an uninsured building or a corporation declares bankruptcy with more bills than credit.
Currently, few literatures specialize in the topic of equity incentive plan of securities firms. Most of literatures only treat the topic as a small part of corporatestock incentive mechanism.
The stock market reacts positively when companies tie CEO pay to, say, stock prices, a sign that those practices build up a corporate value not just for the CEO.