What is a Risk Reversal?
A risk reversal is a zero-cost or near-zero-cost structure combining a long out-of-the-money call and a short out-of-the-money put (or the reverse). It is the cleanest way to express a skew view.
Definition
A standard "long risk reversal" is long a 25-delta call and short a 25-delta put at the same expiry. The premium received from the put roughly finances the premium paid for the call, so the structure can often be put on for zero or near-zero net debit. The position is delta-long (combination of long call delta and short put delta — both contribute positively), and crucially it is "long skew": it benefits when the call IV rises relative to the put IV, regardless of spot direction. The reverse trade (long put, short call) is "short the risk reversal" and benefits from steepening downside skew. On equity indices, the persistent downside skew means a "long risk reversal" is structurally a positive-carry trade — selling expensive puts to buy cheap calls — but it is also short the crash, which is precisely why it pays.
Why it matters & how it's calculated
The risk reversal is the FX-trader's canonical skew instrument. Quote convention: "25-delta RR = +1.5" means the 25-delta call IV exceeds the 25-delta put IV by 1.5 vol points (FX skew is more symmetric, so the sign can flip). On equity, the "RR" is typically negative (puts more expensive). Risk-reversal P&L decomposes into: (1) directional move (long deltas), (2) skew move (RR widening or narrowing), and (3) ATM vol move (the structure is nearly vega-neutral by construction at 25-delta-against-25-delta, so this is minor). On a vol book, a long-RR position is short downside crash exposure — the short put is a sold tail. It is also exposed to vanna: as spot moves, the relative position of the call and put on the skew curve shifts. Hedging a risk reversal requires actively managing the vanna profile and rebalancing the structure as skew changes.
Worked example
You go long 1 SPX 3-month risk reversal: long 1 SPX 5,200 call (25-delta), short 1 SPX 4,800 put (25-delta). Net premium ≈ zero (the put premium roughly funds the call). Net delta: roughly +50 deltas long. If SPX rallies and the surface flattens (call skew firms, put skew softens), the call gains in both spot and skew, the put loses in both — double tailwind. If SPX falls and skew steepens (put IV explodes), you take the directional hit AND the put gets even more expensive to cover — double headwind. Risk reversal is a leveraged view on direction-with-skew.
Related concepts
Learn this in depth on a live desk
These are the building blocks the desk uses every day. The 180+ hour Whop course shows you how they fit together on a real book — and the book walks you through the framework end-to-end.