Examlex
Explain why a stock option is a type of derivative instrument.
Rival Consumption
A situation in which one person's consumption of a good or service diminishes others' ability to consume the same good or service.
Excludable
A characteristic of a good or service that allows its owner to prevent others from using it without permission.
Nonexcludable
A characteristic of a good or service whereby individuals cannot be effectively excluded from using it, often resulting in public goods.
Public Good
A product or service that is made available to all members of society, characterized by non-excludability and non-rivalry in consumption.
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