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Risk Reversals: A Sentiment Gauge From Options

A risk reversal compares the implied volatility of a call option with that of a put option at the same distance from the current price. The difference reveals which direction the options market considers riskier.

For a currency pair like EUR/USD, a call gives the right to buy euros, and a put gives the right to sell. If calls are more expensive than puts, the market is paying more for protection or speculation on euro strength, and the risk reversal is positive. If puts are more expensive, the risk reversal is negative, indicating demand for euro downside protection.

Traders watch it as a sentiment indicator. Extreme readings in one direction suggest crowded positioning. Changes in the risk reversal sometimes precede moves in the spot rate, though not reliably.

The measure comes from institutional options markets, where banks and funds hedge currency exposure. It therefore reflects the views and needs of larger participants, which differ from those of retail traders.

Interpretation requires care. Hedging demand, not directional views, drives some of the pricing. A corporation buying puts to protect revenue is not bearish on the currency.

Use the risk reversal as one input among several, not as a standalone signal.

It is also more informative around events, when positioning changes sharply.

Practical step: find the 25-delta risk reversal for your main pair, and track it for a month next to price.

The hedging point is the important caution. A lot of put demand can just be exporters protecting revenue, not anyone betting on a fall. A European company selling goods in America earns dollars and might buy protection against euro strength, while an American importer might buy protection the other way. Those flows are steady and have nothing to do with short term views. So the absolute level of the risk reversal can be misleading. What tends to carry more information is a sharp change over a few days, especially one that comes with spot moving the same way. That suggests positioning is genuinely shifting rather than routine hedging.

Where I find it useful is extremes. When the reading is very one sided, I'm less keen to join the crowd late in the move. If everyone is paying up for protection against a falling yen, for instance, a lot of the fear is already in the price, and any good news can cause a fast reversal as those positions get unwound. It doesn't tell you when. Extremes can last for weeks. I use it like a caution light, a reason to take partial profits sooner or skip a fresh entry in the crowded direction, not as a signal to bet against the move. The chart still needs to show the turn.