KaraniVIX Futures: Trading Expected Volatility
VIX futures are contracts on the CBOE Volatility Index, letting you trade the market's expectation of S&P 500 volatility over the next 30 days without touching a single option. Each contract settles in cash based on a special calculation of SPX options, not on the VIX index price you see quoted on a screen. The mechanism matters because VIX futures rarely trade at the same level as spot VIX, and that gap is where most of the pain (and the strategy) lives.
What are VIX futures, and what do they track?
The VIX itself is not a tradable instrument. It's a formula, published by Cboe, that backs out a 30-day implied volatility number from a wide strip of S&P 500 index (SPX) options. VIX futures, listed on the Cboe Futures Exchange (CFE), are the tradable version: a contract that lets you take a position on where that 30-day volatility number will land at a future date.
Each VIX futures contract has a multiplier of $1,000 per index point. A move from 18.00 to 19.00 is worth $1,000 per contract. The minimum tick is 0.05 points ($50) for outright contracts and 0.01 points ($10) for calendar spreads. Contracts expire on a Wednesday, 30 days before the corresponding SPX option expiration, which is why the futures track forward-looking volatility rather than today's.
How VIX futures settle
At expiration, a VIX futures contract doesn't settle to whatever the VIX index reads on your screen at that moment. It settles to a special opening quotation (the VRO), calculated from a Wednesday-morning auction in SPX and SPX-weekly options with the matching 30-day window. That calculation can differ meaningfully from the last-traded VIX print the night before, especially around events like an FOMC announcement or a geopolitical shock.
This is a detail that trips up people new to the product. You can watch VIX close at 16 on Tuesday and see your VIX future settle Wednesday morning at 17.40, because the settlement process resamples a fresh options chain rather than echoing the index tape.
A long VIX futures position can lose money even if the VIX never moves, because time itself is the cost of holding it in contango.
What is term structure in VIX futures?
Term structure just means the relationship between VIX futures of different expirations at the same moment. Line up the front-month, second-month, and third-month contracts and you get a curve. Most of the time, that curve slopes upward: near-term contracts sit below longer-dated ones. This condition is called contango.
Contango happens because VIX tends to mean-revert. Spot VIX often sits below its long-run historical average (roughly the high teens), so the market prices in some drift back toward that average the further out you look. When something scares the market, the relationship flips: front-month VIX futures jump above the back months because near-term fear is being priced higher than the calmer expectation further out. That's backwardation, and it shows up reliably during sharp equity selloffs.
The contango roll cost that bleeds long VIX positions
Here is the mechanism that matters most for anyone holding VIX exposure through futures or a futures-based ETN. If the curve is in contango and VIX doesn't move at all, a long futures position still loses money. As time passes, the contract you're holding rolls down the curve toward the lower spot price, and that decay repeats every time you roll to the next month out.
Picture a simple example. Front-month VIX futures trade at 16.00, second-month at 17.50. Spot VIX doesn't move an inch over the next few weeks. As expiration approaches, the front-month contract has to converge toward that 16.00 spot level, and the position you rolled into (now sitting at what was 17.50) starts its own slide down. Roll month after month in a persistent contango environment and the cumulative drag is real money, not a rounding error.
This is exactly why long-volatility products built on VIX futures (the VXX-style ETNs) tend to bleed value over long stretches even when nothing dramatic happens in the market. The product isn't broken. It's doing exactly what a strip of contango futures does when time passes and volatility stays quiet.
Why traders use VIX futures anyway
Despite the roll cost, VIX futures get used two ways. Speculators sell them expecting contango and calm markets to persist, collecting the roll-down as an edge, though that trade can get run over hard and fast when volatility spikes. Hedgers buy them (or buy VIX calls) as portfolio insurance, accepting the contango bleed as a known cost of protection against the exact scenario where backwardation kicks in and long volatility finally pays off.
For a systematic ES trader, VIX futures are more often a read on positioning and risk appetite than a position to hold outright. A steepening front-end, or a sudden flip from contango to backwardation, tells you something concrete about how the options market is pricing near-term risk in the S&P 500, independent of what price itself is doing.