What Is a Derivative Instrument That Allows an Investor to Profit from a Reduction in Stock Supply?
A call option is the most direct derivative instrument. A stock buyback, by reducing supply and increasing EPS, typically drives the stock price up.
An investor holding a call option has the right to buy the stock at a set price (strike price). If the buyback causes the market price to rise above the strike price, the call option increases in value, allowing the investor to profit.