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Stock appreciation rights do not cause dilution to the existing shareholders since no shares are actually issued.

Performance stock is a type of stock grant. It is contingent on meeting performance goals such as accounting earnings or other financial reporting metrics like return on assets or return on equity. Unfortunately, tying performance to accounting earnings and other metrics may result in manipulation by the employee. With restricted stock, the transferred stock cannot be sold by the employee until vesting has occurred.

Phantom stock is similar to stock appreciation rights except the payoff is based on the performance of hypothetical stock instead of the firm’s actual shares.