What Is a Volatility Swap?
Let me explain what a volatility swap is directly to you. It's a forward contract where the payoff depends on the realized volatility of an underlying asset. These swaps settle in cash based on the difference between that realized volatility and a pre-set volatility strike or fixed level. You can use them to trade the volatility of an asset without touching the asset itself.
Keep in mind, volatility swaps aren't swaps in the usual way, where parties exchange cash flows. They're more like variance swaps, with payoffs tied to realized variance.
Key Takeaways
Here's what you need to know upfront. A volatility swap is a forward contract paying out based on the gap between realized volatility and the volatility strike. The actual payoff comes from multiplying the contract's notional value by that difference. Unlike typical swaps that swap cash flows on fixed or variable rates, these don't involve any cash flow exchanges—they're strictly payoff instruments focused on volatility.
Understanding Volatility Swaps
You should understand that volatility swaps are straightforward tools for betting only on how much an asset's price will fluctuate, ignoring the price direction itself. Just as you'd speculate on asset prices, these let you speculate on volatility levels.
The term 'swap' doesn't fit perfectly here, since real swaps involve exchanging cash flows, often fixed against variable rates. Volatility swaps, like variance swaps, are essentially forward contracts with payoffs from the asset's observed variance. At settlement, the payoff is the notional amount times the difference between volatility and the strike.
Note that no notional amount changes hands at the start. The volatility strike is a fixed figure set to match market expectations of future volatility when the swap begins. It's akin to implied volatility but not identical to what's seen in options. The strike is chosen so the contract's net present value starts at zero, and the final payoff hinges on how actual volatility compares to that strike.
Using Volatility Swaps
If you're considering volatility swaps, know they're a direct bet on an asset's volatility. Options can also let you play volatility, but they come with directional risk and depend on time, expiration, and implied volatility, requiring extra hedging. Volatility swaps skip all that—they're purely about volatility.
You'll find three main types of users. Directional traders speculate on future volatility levels. Spread traders bet on the spread between realized and implied volatility. Hedge traders cover short volatility positions with them. Also, variance swaps are more popular in equity markets than volatility swaps.
Example of How to Use a Volatility Swap
Let me walk you through a simple example. Suppose an institutional trader sets up a volatility swap on the S&P 500 index, expiring in twelve months with a $1 million notional. Implied volatility is 12%, so that's the strike.
After twelve months, realized volatility hits 16%. That's a 4% difference, meaning a $40,000 payoff. The seller pays the buyer $40,000, assuming the seller holds the fixed leg and the buyer the floating one.
If volatility had fallen to 10%, the buyer would pay the seller $20,000 on a 2% difference. This is simplified—real OTC volatility swaps might annualize rates or base differences on daily changes, depending on how they're structured.
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