Put Butterfly
A put butterfly is a neutral, limited-risk strategy that is structurally identical to the call butterfly but uses put options instead. It is designed to profit from a stock price remaining stagnant and "pinning" a specific target price at expiration. The strategy is constructed using three equidistant strike prices: purchasing one "in-the-money" (ITM) put at a higher strike, selling two "at-the-money" (ATM) puts at the middle strike, and purchasing one "out-of-the-money" (OTM) put at a lower strike.
Traders generally choose a put butterfly when they believe a stock is overvalued or has finished a bearish move and will now consolidate at a specific lower level. While call and put butterflies have the same theoretical payoff at expiration, the put version is sometimes preferred if put premiums are slightly higher due to "volatility skew" (the market's tendency to price downside protection more expensively). Like the call version, it is entered for a net debit, which represents the maximum risk.
The payoff structure forms a sharp peak of maximum profit at the middle (short) strike. The maximum profit is the distance between the strikes minus the initial debit paid. There are two break-even points: the upper strike minus the premium paid, and the lower strike plus the premium paid. For example, if you buy a $105 put, sell two $100 puts, and buy a $95 put for a $1 debit, the trade reaches its maximum $400 profit if the stock is exactly at $100 at expiration. If the stock moves significantly above $105 or below $95, you lose only the $100 ($1.00 x 100 shares) paid to enter.
Time decay (theta) is the engine of the put butterfly. The trade is most profitable in the final days of the expiration cycle because the two short puts lose their "time value" much faster than the two outer long puts. Because the profit zone is so narrow, the trade has a low probability of hitting the maximum payout, but it offers an exceptional risk-to-reward ratio—often allowing a trader to risk a small amount of capital for a potential return several times larger.
Managing a put butterfly requires a "hands-off" approach until near expiration. Since the maximum profit only occurs when the short options are almost entirely decayed, exiting too early often results in capturing only a small fraction of the potential gain. However, if the stock price moves outside the "wings" (the outer strikes), the position is usually left to expire worthless as a total loss, as the cost to "roll" or adjust a butterfly is often not worth the remaining value.
The put butterfly is a precise surgical tool for the options market. It is best used on stocks with high liquidity and narrow bid-ask spreads, as entering and exiting a four-legged trade can be costly in terms of "slippage." It is a favorite for traders who enjoy "pinning" stocks on triple-witching Fridays or after a period of intense volatility has cooled off.
