Google is testing the ability to click on a word in a featured snippet within Google Search and define that word. You can also copy the word, if you want. I think this is a Google Search test and ...

Stock options are contracts that give the holder the right, but not the obligation, to buy or sell a specific number of shares of a company's stock at a predetermined price within a set time period.

Options greeks are a group of variables that affect option positions. They are typically referred to as delta, gamma, theta, vega, and Rho in the options market. These variables indicate how changes ...