Bid

Where it is explained in full

Covered calls: the whole position, not just the premium. Selling a call against stock you own puts money in your pocket today and gives something up tomorrow. Look at both halves, or the premium will look like free money when it is not.

Options from the beginning: calls, puts, and the Greeks in plain words. What a contract actually is, what the numbers on the screen mean, and why an option's value before expiration is not the same as its payoff at expiration.

A definition says what a thing is; it never says whether it fits you. The guides explain how it works and name the professional who confirms it for a particular person. The No Advice Disclosure.