How are options settled?

Physical settlement leaves an underlying transaction. A standard equity call that is exercised generally buys the contracted shares at the strike, while assignment of a short call generally delivers them. A put can sell or buy shares depending on which side is exercised or assigned. Adjusted contracts may have unusual share counts, cash, or other deliverables.

Cash settlement leaves no shares under the option contract. A cash-settled call commonly pays the positive difference between the official settlement value and strike, multiplied by the contract multiplier and quantity; a put reverses the difference. Physical versus cash-settled options shows why the resulting portfolio exposure differs even when two options reference a similar index.

American style generally permits the holder to exercise on eligible business days through expiration, subject to the product terms. European style generally permits exercise only at the specified expiration point. Both styles can be closed in the market before the last trading time, and neither label alone tells you whether shares or cash will be delivered.

This distinction matters for an option held through a dividend, an early-exercise decision, or a short position exposed to assignment. Read American versus European options and settlement with the exact series specification instead of inferring a rule from a familiar ticker.

AM and PM describe when the official settlement calculation is made, not simply when the option screen stops moving. An AM-settled index series can use a special opening quotation assembled from component openings, while a PM series can use a specified closing methodology. The official value may differ from the last visible index level or the option's last trade.

The last trading day can precede the legal expiration date, and a broker's exercise or contrary-instruction cutoff can precede the exchange deadline. Option settlement value versus closing price keeps the option quote, underlying close, and official settlement value separate.

The option event and the later movement of cash or shares are related but not identical. A closing trade has its own securities settlement cycle. Exercise or assignment can create a stock or cash obligation that the broker posts under its procedures, and buying power can change before the public open-interest field updates.

For a physical delivery, record the expected shares, strike cash, borrowing or margin effect, and payment date. For cash settlement, record the formula, multiplier, preliminary or final status, and expected posting date. How long do option trades take to settle? covers the trade timeline; assignment trade date versus settlement date covers why an assigned position can appear before the underlying transaction settles.

Keep the exchange specification and broker confirmation beside the note when the position is close to expiration.

1. Identify the exact root, series, strike, expiration, multiplier, and deliverable
2. Confirm physical or cash settlement separately from American or European exercise
3. Record the last trading time, AM or PM calculation, official reference value, and broker cutoff
4. Model exercise, assignment, expiration, and closing-trade outcomes for each leg
5. Confirm the broker posting, cash or shares, and later statement against the contract specification

If the position is a spread, review every leg and the result if one leg is assigned or expires differently. Settlement is a package of contract rules, not one universal market-close event.