Butterfly Spread

The butterfly spread is one of the most precise options strategies for trading a 'stay put' view on a stock. A standard long call butterfly is constructed by buying one lower-strike call, selling two middle-strike calls, and buying one higher-strike call — all at the same expiration. The result is a tent-shaped profit and loss diagram with maximum profit at the middle strike and limited, defined losses beyond the outer strikes.

Consider a stock trading at $100. A long call butterfly might involve buying the $95 call for $6, selling two $100 calls at $3 each (collecting $6 total), and buying the $105 call for $1. Net debit is $6 - $6 + $1 = $1 per share ($100 per contract). Maximum profit is $4 per share ($400 per contract) — achieved only if the stock closes exactly at $100 at expiration. Maximum loss is the $1 debit paid, realized if the stock closes below $95 or above $105.

The butterfly's defining characteristic is its extraordinarily favorable risk/reward ratio: risking $1 to potentially make $4 is a 4-to-1 reward ratio. However, the probability of achieving maximum profit is low because it requires the stock to close precisely at the center strike. In practice, traders accept partial profits by closing the position when it has appreciated by 25% to 50% of maximum potential, rather than waiting for expiration.

Butterflies can also be constructed using puts (long put butterfly) or by combining puts and calls (iron butterfly, which is essentially an iron condor with zero-width spreads). The iron butterfly — selling both an ATM call and ATM put while buying protective OTM wings — collects a net credit rather than paying a debit and profits from the same range-bound movement.

Because the maximum profit zone of a butterfly is narrow, the strategy is best employed when the trader has a specific price target for the stock at expiration — not merely a directional view. Earnings plays, technical mean-reversion trades, and dividend-capture scenarios where a stock is expected to remain anchored near its current price are common butterfly applications.

Butterfly Variations: Several structural variants of the butterfly expand its utility. A broken-wing butterfly (also called a skip-strike butterfly) shifts the strike spacing asymmetrically — for example, buying the $95 call, selling two $100 calls, and buying the $107 call instead of $105. This creates a position that can be entered for a zero or near-zero debit by skipping to a wider outer wing, accepting a small risk on one side in exchange for collecting a net credit. A calendar butterfly combines butterflies at the same center strike across different expirations to exploit both time-value decay and a range-bound view. A condor is the wider-body cousin of the butterfly: instead of two short strikes at the same price, the condor sells the two middle strikes at different prices, widening the maximum profit zone at the cost of a slightly smaller maximum gain.

When to Use Butterflies: Butterflies are most effective in three specific scenarios. First, when the trader has high conviction that a stock will settle near a specific price at expiration — common in stocks with strong technical support or resistance levels. Second, when implied volatility is elevated relative to expected realized movement, making the debit butterfly cheap relative to its theoretical maximum value. Third, as an event-driven trade where a known catalyst — such as an earnings report — is expected to produce a modest, range-bound reaction rather than a large gap. Avoiding butterflies in trending, high-momentum environments is equally important: a stock that moves decisively in one direction will push through the outer strike and result in the maximum loss on the debit spread, with the narrow maximum-profit zone offering no consolation.