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Contract specifications6 minute readAug 25, 2026

American vs. European options and settlement

Compare exercise style with physical or cash settlement, and check trading deadlines before holding an option into expiration

Prepared by Mark · Primary sources below

In this guide

  1. Separate exercise style from settlement method
  2. Check the clock and settlement reference
  3. Match expiration risk to the exact product

Direct answer

American and European describe when an option can be exercised, not where it trades. An American-style holder can generally exercise on eligible business days through expiration, while a European-style holder can exercise only at the specified expiration time. Settlement is a separate specification: an exercised contract may deliver shares or settle in cash. The combination affects assignment, funding, final trading time, and expiration risk

Separate exercise style from settlement method

Standard U.S. equity and ETF options are generally American style and physically settled, so exercise or assignment leads to a share transaction. Many index options are European style and cash settled, but product specifications vary. European style does not prevent selling an open option before its last trading time; it limits exercise, not ordinary closing trades

Check the clock and settlement reference

Some products stop trading before the date used for their final settlement calculation, and index settlement may use an opening or closing value rather than the last level a trader saw. Brokerage exercise cutoffs can also be earlier than exchange deadlines. After-hours moves can affect exercise decisions and assignment exposure even after regular option trading ends

Match expiration risk to the exact product

Before holding through expiration, verify exercise style, last trading day and time, settlement type, settlement value method, automatic-exercise policy, and broker cutoff. For physical settlement, confirm the cash or shares required; for cash settlement, understand when the final amount is determined. Never apply an equity-option assumption to an index product based only on a familiar ticker

Sources and further reading

  • [1]Options Exercise
  • [2]Exercising Options
  • [3]Options Assignment

What to remember

  1. Exercise style and settlement method are independent contract specifications
  2. Last trading time, exercise cutoff, and settlement calculation may occur at different moments
  3. Expiration planning must use the exact product rules and the broker's procedures

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