A stock, also known as a share, is a tradable claim to fractional ownership of the corporation that issued it.| Investopedia
A call option is a contract that gives the option buyer the right to buy an underlying asset at a specified price within a specific time period.| Investopedia
A hedge fund pools the money of a limited partnership of private investors; fund managers invest in risky and nontraditional assets to obtain above-average returns.| Investopedia