rolling
Closing one option contract and immediately opening a new one on the same stock, often at a different price or date.
Where it is explained in full
Workplace plans: the 401(k), the 403(b), and the TSP, from the first paycheck to the last. Everything a person needs to open one, fill it, hold the right things in it, avoid the traps, and carry it with them when they leave. Long on purpose, so that one page is enough.
Bonds and Treasuries: lending money, with a price that moves. A bond is a loan you make. The interest is fixed, the price is not, and the relationship between the two confuses nearly everyone the first time.
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.
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.
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A model reads this page and answers from it. It will say when the answer is not on the page. Education, not personalized advice.