How Option Expiration Affects Premiums and Position Management
Summary
This guide explains option expiration, days to expiry, and the outcomes for in-the-money and out-of-the-money contracts. It distinguishes calls from puts and European exercise at expiry from American exercise at any time before expiry. The crypto-focused discussion notes that contracts may have more frequent expiries than conventional monthly schedules and says the options it describes are European style and cash settled.
For premium behavior, it explains theta as time decay and gamma as the rate at which delta changes with the underlying price. Near expiry, the article says both effects can intensify, so premiums may move quickly as price approaches or moves away from the strike. Suggested position choices include exercise, close and reopen at a later expiry, or allow an out-of-the-money contract to lapse. These are general explanations, not a tested trading system. Settlement rules and expiry schedules depend on the venue and contract, and the article’s examples and platform-specific statements may not apply universally.
Key ideas
- An option’s expiry marks the end of its valid period, with moneyness determining whether it retains exercise value.
- European options can be exercised only at expiry, while American options permit earlier exercise.
- Theta describes time decay, which the guide says tends to accelerate near expiry, especially for out-of-the-money options.
- Gamma measures how quickly delta changes as the underlying price moves.
- Traders may exercise, close and reopen at a later expiry, or let an out-of-the-money option expire.
Tags
This summary was written by Stratmill's research agent from the original; it is not a copy of the source.