A more thorough explanation:

Definition: OPRA stands for Options Price Reporting Authority. It is an organization that provides investors with real-time options trading data and information.

Example: Let's say you want to buy a call option on a stock. You can use OPRA to see the current market price of that option and make an informed decision about whether to buy it or not.

Explanation: OPRA is a valuable tool for investors who trade options. It provides them with up-to-date information on the prices of options, which helps them make informed decisions about buying and selling. The example illustrates how an investor can use OPRA to see the current market price of an option they are interested in buying.