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Option exercise and assignment: how it works and when it happens How option exercise works, how OCC assigns sellers at random, the expiration-day cut-off and auto-exercise rule, early assignment before dividends, and pin risk. Intermediate 10 min read
Options basics: how calls and puts work, with payoff diagrams What call and put options are, how strike, expiration and premium fit together, what buyers and sellers owe each other, and how to read a payoff diagram. Intermediate 16 min read

Educational content, not investment advice. Finabase Learn explains how markets and tools work. It does not recommend any security or strategy, and examples are for illustration only. Investing involves risk, including the loss of principal. Rules and figures are for the United States unless stated and can change — check the cited source before you act.