Calls and Puts Explained in Plain English

Calls and puts are the two basic option types. The buyer owns a right; the seller accepts an obligation if assigned.

Call buyer

A call buyer may benefit when the underlying rises enough to overcome the premium. The premium paid is generally the buyer’s defined maximum loss under a simple long-call position.

Call seller

A call seller can be obligated to sell shares at the strike. An uncovered call can have theoretically unlimited loss because the underlying can keep rising.

Put buyer

A put buyer may benefit from a decline. The premium is generally the maximum loss for a simple long put.

Put seller

A put seller can be obligated to buy shares at the strike. The loss can be substantial if the underlying collapses.

Expiration is not the only decision point

Most options positions can be closed before expiration. Exercise, assignment, liquidity, dividends, and settlement rules can change the practical outcome, so confirm the exact contract and broker procedures.