Bearish Risk Reversal

A bearish risk reversal purchases a lower-strike put and sells a higher-strike call on the same underlying, with equal quantities, matching contract sizes, and a common expiration. The call premium helps finance the put without limiting its gains from a decline. In exchange, the short call introduces an obligation to deliver the underlying after a rise.

The position considered here contains no shares covering that call. Its downside profit is bounded by a stock or ETF price of zero, whereas its upside loss is unlimited. Reversing the two trades produces a bullish risk reversal.

Construction and example

A hypothetical example uses SPY at $750 and options with 45 days remaining. Purchasing one $725 put for $6.50 per share and selling one $775 call for $8.50 receives a $2 per-share net credit. With standard 100-share contracts, the $850 call premium exceeds the $650 put cost by $200. The credit is accompanied by an uncovered call obligation.

Expiration payoff

From $725 through $775 at expiration, both options have zero intrinsic value and the $200 credit is profit. Below $725, the put’s fixed sale price becomes more advantageous as SPY falls. At $700, the put has a $25 per-share payoff, or $2,500 for the contract. Adding the opening credit produces a $2,700 profit.

Above $775, the call obligation reduces the credit while the put has no payoff. At $777, the call’s $2 per-share intrinsic value exactly exhausts the premium received, giving the expiration break-even. At $800, the call’s $25 per-share payoff creates a $2,500 obligation and a $23 per-share loss, or $2,300 after the $200 credit.

Below the put strike, every additional $1 decline adds $100 to the pair’s profit. Above the call strike, every additional $1 rise reduces the result by $100. The profitable central interval does not limit this upper-price exposure: the call obligation continues increasing however far SPY rises.

Value before expiration

With other inputs unchanged, a fall in SPY generally benefits both legs, increasing the put’s value and reducing the call’s repurchase cost. A rise generally harms both. These changes can occur while SPY remains between the strikes, where both options would have zero payoff if expiration occurred at that price.

Higher implied volatility generally raises both option prices, benefiting the purchased put but increasing the short call’s liability. The net effect depends on their relative sensitivities and on whether the IV at both strikes changes equally. A volatility increase concentrated in the put can benefit the position, while an increase concentrated in the call can have the opposite effect. Time decay likewise reduces both the put asset and the call liability, with the net result depending on which loses more value.

Closing the position sells the put and purchases the call. The trading result is the $200 opening credit plus the put’s sale proceeds, less the call’s repurchase cost. This calculation uses actual available option prices, including remaining time value, rather than the expiration payoffs alone.

Exercise, assignment, and execution

SPY options permit American-style exercise and physical settlement. Assignment of the short $775 call sells 100 shares at that price and may leave short stock if shares were not held. The purchased $725 put remains open, but its right to sell shares cannot provide the shares needed to cover the call delivery. It is not protective against a further rise.

Exercising the put sells 100 shares at $725. Without owned shares, that transaction can establish short stock or add to an existing short position, subject to account permissions. Selling the put instead receives its market value, including time value, without creating that sale of shares. Any short shares remaining after exercise or assignment require a separate purchase to close and remain exposed to later price increases.

Margin requirements on the uncovered call can increase as SPY rises. The account may therefore require additional collateral before any assignment occurs. A complex closing order can trade the two option legs together at a specified net price and ratio, but unfilled quantities and previously created shares remain open.

Payoff formulas

Let $K_P<K_C$ denote the put and call strikes, and let $c$ be the call premium received less the put premium paid per share. Positive $c$ denotes a credit; negative $c$ denotes a debit. For final underlying price $S_T$, $q$ matched pairs, and multiplier $M$:

The put’s positive payoff is added to the credit and the call’s positive payoff subtracted. For an opening credit, the only break-even lies above the call strike:

At a zero underlying price, the put reaches its largest payoff. When $K_P+c>0$:

For an opening debit, $c<0$, break-even instead occurs at $K_P+c$, provided that price is nonnegative. At zero net premium, the interval from $K_P$ through $K_C$ has zero profit or loss. Above the call strike, the result has slope $-qM$ dollars per $1 increase in the underlying, giving unlimited maximum loss. Complete-pair quantity changes scale the dollar results without changing the break-even conditions.