Programming languages used in the 1990s to program many personal computer and UNIX based applications. Call option: An asset which gives the owner the right but not the obligation to purchase some other asset for a set price on or up to a specified date. Capital asset pricing model (CAPM): A model in which the cost of capital for any security or portfolio of securities equals a risk-free rate plus a risk premium that is proportionate to the systematic risk of the security or portfolio. Capital loss carryover: The excess of capital losses over capital gains that may not.