Combination

An option gives a holder defined rights under a contract, and by buying or selling several contracts together a trader can shape gains and losses across possible future prices. The resulting position is a combination.

The legs can be calls, puts or both, and they may use different strikes or expirations but typically refer to the same underlying asset for the strategy being described. A vertical spread uses different strikes with a common expiration, while a calendar spread uses different expirations.

These are examples of how changing one contract feature changes the combined payoff. A straddle uses a call and a put at a shared strike and expiration, and its direction and profit profile depend on whether the trader buys or sells them, so the name alone does not convey risk.

A short iron butterfly illustrates a more complex combination. The Options Industry Council describes two short options at a middle strike with a long put below and long call above, using one expiration.

The wing options can limit expiration loss in that particular structure, but that bounded result should not be generalised to every combination, because uncovered short options can create substantial exposure. Net premium is the sum of premiums paid and received, with signs determined by each leg.

It is not the whole profit because option values move and the broker may charge commissions or fees. A trader can assess a strategy at expiration by adding each leg's payoff and subtracting net cost, while before expiration changes in implied volatility, time and underlying price all affect option values.

Multi-leg execution may occur as a packaged order or through separate fills, and separate execution can create temporary unhedged exposure or a worse net price than expected. Short contracts can be assigned under applicable exercise rules, so a position that looks balanced at expiration may create stock or cash obligations before then, particularly when legs expire or are exercised at different times.

Margin treatment depends on the contracts, broker and trading permissions, and a limited theoretical maximum loss does not mean a trader never needs extra cash to manage the position. Liquidity is leg-specific, since a thinly traded strike can widen the bid-ask spread and make entry and exit expensive even when a payoff diagram looks attractive.

Combinations may seek a narrow price range, a directional move or reduced risk compared with another position, and there is no universal superior strategy for all market conditions. Options can lose value quickly as expiration approaches, and selling premium is not the same as guaranteed income, so a useful review records each leg, quantity, strike, expiration, buy or sell direction, net price and possible assignment.