Butterfly Spread — Strategie de opțiuni

A butterfly spread is a precise, market-neutral options strategy that profits from minimal movement in the underlying, earning maximum gain when the stock closes exactly at the middle strike at expiration. The strategy is constructed using three strikes: buy one option at the lower strike, sell two options at the middle strike, and buy one option at the upper strike—all with the same expiration and type (all calls or all puts).

The butterfly's profit zone is a narrow peak centered on the short middle strike, with breakeven points at the lower strike plus the debit paid and the upper strike minus the debit paid. Maximum profit equals the distance between adjacent strikes minus the total debit paid. Maximum loss is the net debit—the premium paid to enter the trade. The risk/reward ratio is often highly favorable on paper (e.g., risking $1 to potentially profit $4), but the probability of achieving maximum profit is low since it requires the stock to land at a specific price.

Call butterflies and put butterflies have similar P&L profiles but use different option types. Traders choose based on which spread is more liquid or offers a more favorable price. Butterflies can also be built with mixed legs—a 'long butterfly' uses all calls or all puts; an 'iron butterfly' mixes calls and puts (see the iron butterfly strategy).

Butterfly spreads are used in several contexts: to bet on a stock staying near a specific price (e.g., a stock pinned at a round number heading into expiration), to express a very precise price target, or as a low-cost speculative structure near earnings when you expect the stock to stay within a tight range. Their low cost relative to potential gain makes them popular for high-probability scenarios where you have high confidence in a specific price outcome.

Management of butterfly spreads is relatively simple because the maximum loss is already small (the debit paid). Most traders hold to expiration if the stock is near the sweet spot, or close for a small loss if the stock moves significantly away from the center strike. The butterfly benefits from time decay as expiration approaches if the stock remains near the short strikes.