Butterfly Spreads 103: Selecting the Right Structure

Low Debit vs. Neutrality

The smallest-debit butterflies usually occur when the stock is away from the middle strike.

If the stock is near the upper strike, your debit is smaller but you must be bearish to profit (stock falls toward the middle).

If the stock is near the lower strike, your debit is smaller but you must be bullish to profit (stock rises toward the middle).

Where Butterflies Work Best

Butterflies tend to work better on higher-priced or more volatile stocks with strikes spaced 10 or 20 points apart.

Wider spacing creates larger max profit, which can overcome commission drag.

On lower-priced stocks with 5-point spacing, the potential profit is often too small unless the debit is extremely low.

A practical filter is to compare max profit to total commissions. If the best-case profit is not meaningfully larger than fees, skip the trade.

5-Point Spacing Example (Skewed Risk)

Example prices: Stock $50, July 45 call $7, July 50 call $5, July 60 call $2.

A standard 45/50/60 butterfly can be opened for a 1-point credit.

That sounds good, but the payoff is no longer symmetric: upside risk can reach about 4 points if the stock is above $60 at expiration.

Directional Butterflies (Low Debit Trades)

Example: Stock at $70 with strikes 50/60/70 can be built for a very low debit.

That low debit is not free. It implies you need a move down toward $60 to hit max profit.

Conversely, a low-debit butterfly built with the stock near the low strike implies you need a move up toward the center.

Use Bid/Ask Prices

Analysis often starts with closing prices, but your execution happens at bid/ask.

Because a butterfly uses three different strikes, small bid/ask differences can add up quickly.

Always check live quotes before setting your net debit order.