How to Trade the VIX: What It Is, Why It Decays, and the Risks

The VIX is not a company, a basket of shares or a market you can buy. It is a calculated measure of how much movement the options market expects in the S&P 500 over the next month, and the products built on it are designed in a way that loses value over time for anyone who simply buys and holds.

VIX (Volatility Index) at a glance

What you are actually trading

This is the section to read twice, because almost every VIX mistake traces back to not understanding it.

You are not trading the VIX. When your platform shows a VIX price, it is almost certainly showing the front-month VIX future or a CFD derived from it, not the spot index. Those two numbers are usually different, sometimes substantially. The future is not a discounted version of spot; it is the market’s expectation of where the 30-day volatility measure will sit on the future settlement date. When spot VIX is low, the market generally expects it to be higher later, so the future trades above spot. When spot VIX has spiked, the market generally expects it to fall back, so the future trades below spot.

That is contango and backwardation, and it is the whole game. Contango, the normal state, means each contract you hold is priced above where spot currently sits, and as settlement approaches that premium has to erode. If spot VIX stays exactly where it is, a long position in the future loses money. Not because you were wrong about direction, but because you were right about direction and direction was not what you were being paid on. Roll that position from one month to the next and you pay the premium again. This is the mechanism behind the well-known long-run decline of long-volatility exchange traded products: over years, several of them have lost the overwhelming majority of their value, and several have had to reverse-split repeatedly simply to keep a workable share price. That is not a fault in those products. It is the products doing exactly what their construction dictates.

Backwardation is the mirror image. In a genuine market panic, spot VIX spikes above the futures, because everyone expects the panic to subside. Long positions then have the roll working for them, but you only get that condition when the crisis is already underway, which is precisely when the entry price is worst.

The front-month future does not move one-for-one with spot. If spot VIX jumps 40%, the front-month future will typically move considerably less, because the market expects the jump to fade before settlement. Traders who buy a VIX product expecting to capture the headline percentage move are routinely disappointed even when their market call was exactly right.

And it is mean-reverting. Unlike a share price, the VIX cannot go to zero and it cannot rise forever. It has an effective floor in the high single digits, there is always some demand for S&P 500 options, and spikes decay. Historically it has closed above 80 only in genuine crises. Anything that spikes and reverts is a bad candidate for buy-and-hold and a poor candidate for trend-following.

What moves the price

S&P 500 direction, especially downside

The VIX and the S&P 500 have a strong negative relationship, and it is asymmetric. Falling equity markets produce demand for downside protection, which raises option prices, which raises the VIX. Rising markets produce a slow drift lower in option prices and a slow drift lower in the VIX.

The asymmetry matters practically: the VIX goes up much faster than it comes down. A 3% equity fall can produce a violent VIX spike in hours; the subsequent decay takes days or weeks.

Demand for portfolio insurance

The VIX is ultimately a price, and prices respond to supply and demand. Large institutions buy S&P 500 puts to hedge portfolios, and that hedging demand pushes option prices, and therefore the VIX, higher independently of what the market has actually done. Conversely, systematic option-selling strategies supply volatility and press it lower.

This is why the VIX sometimes rises on a flat day: someone large is buying protection ahead of something.

Scheduled macro events

Federal Reserve meetings, US CPI releases, payrolls, elections and major earnings all create known dates of uncertainty. Options spanning those dates carry more premium, which lifts the VIX in the days beforehand and frequently produces a fall immediately afterwards once the uncertainty resolves, a pattern often described as a volatility crush.

Buying volatility into a known event and holding through it is a common way to be right about the event and still lose money.

Realised volatility and market conditions

Implied volatility does not float free of reality. When the market is genuinely moving a lot day to day, option sellers demand more premium and the VIX stays elevated. When the market grinds quietly, realised volatility falls and implied volatility follows it down. Prolonged calm compresses the VIX, which is exactly when it looks cheapest and is most expensive to hold.

Positioning and volatility supply

The volatility market has its own structural participants: option-selling funds, structured products, dealer hedging books and volatility-targeting strategies. Their positioning can amplify moves dramatically. February 2018 remains the reference case, when a rapid VIX spike forced the unwinding of short-volatility products and one prominent inverse-volatility exchange traded note lost almost its entire value in a single session and was terminated.

The lesson is that volatility markets can move in ways that have nothing to do with the equity market’s fundamentals and everything to do with who is forced to buy.

The shape of the futures curve itself

For anyone actually holding a position, the curve is a driver in its own right. Steep contango means a meaningful daily cost to being long. Backwardation means a daily benefit. Checking the shape of the curve before entering a VIX trade is at least as important as having a view on volatility, and most retail traders never look at it.

The best time of day to trade VIX (Volatility Index)

The headline VIX value that gets quoted tracks the US cash equity session, 09:30 to 16:15 New York time, which is 14:30 to 21:15 UTC in winter and 13:30 to 20:15 UTC in summer. The United States changes its clocks on different dates from Europe, so for two short periods each year the gap between London and New York is an hour different from usual; the market hours tool is worth checking then. Cboe also publishes the index during an extended global session beginning in the early hours of the New York morning.

VIX futures, however, trade close to around the clock on weekdays, in a global session and a US session. That is why your broker will quote you a VIX price at three in the morning. It is not the index; it is a thinly traded futures contract.

The distinction matters more here than on an equity index. The VIX measures expected movement in S&P 500 options, and S&P 500 options are traded most actively during US cash hours. Outside those hours the input to the calculation is thin, the futures contract is thinner still, and the spread on a retail CFD widens considerably. A VIX move at 04:00 UK time is not information; it is a small number of participants adjusting positions in an illiquid market.

The New York session is therefore the only window in which VIX pricing genuinely reflects the market it is supposed to measure. The most informative period within it is the first hour after the 09:30 open, when overnight news is absorbed and hedging demand is repriced, and the final hour, when institutional hedging flow concentrates.

Gap risk exists but works differently from an equity index. Because the futures trade nearly continuously, there is no single opening auction that produces a gap. Instead the risk is that a shock arrives when the futures market is thin, and the price you can actually get is far from the price displayed. In a genuine volatility event, VIX spreads widen dramatically and stop-loss fills can be materially worse than expected, in both directions.

Times follow the live session clock. Use the forex market hours tool to convert any of these into your own timezone, and see the session times hub for why fixed UTC tables are wrong half the year.

How different traders approach it

If you are brand new

The honest advice for a beginner is that the VIX is not a suitable instrument to learn on, and the reason is not that it is volatile. It is that the instrument does not do what its name implies, and beginners lose money not by getting the direction wrong but by not understanding what they bought.

Here is the trap, stated as plainly as possible. You look at a chart of the VIX. It is at a low level. You think: this thing has spiked to 30, 40, even 80 before, and right now it is at 13. The downside is limited because it cannot go below about 9. The upside is enormous. This looks like the best risk-reward I have ever seen. I will buy it and wait.

That reasoning is wrong for three separate reasons, and each one alone is enough to lose you money.

One: you cannot buy the thing on the chart. You are buying a future, and when spot VIX is 13 the future is probably priced meaningfully higher. You are not buying at 13. You are buying at a level that already assumes some of the rise you are hoping for.

Two: you pay to wait. In contango, the contract you hold declines towards spot as settlement approaches. Every day the VIX does not spike, your position loses a little. Every month you roll to the next contract, you pay the premium again. Waiting is not free here, waiting is the cost.

Three: it can stay low for a very long time. Calm periods in markets have lasted many months. Your position bleeds throughout, and by the time a spike arrives you may have lost more waiting than the spike pays you.

This is why long-volatility exchange traded products have lost the vast majority of their value over the years despite the VIX itself ending up roughly where it started. The products are not broken. Buying and holding them is.

If you want exposure to market fear as a beginner, understand that the practical alternatives (simply holding less equity exposure, or trading a smaller size) cost you nothing to maintain, while a long VIX position charges rent every single day.

If you already trade but results are inconsistent

If you are an intermediate trader considering the VIX, the first discipline is to stop looking at the spot chart and start looking at the futures curve. Your profit and loss comes from the contract you hold, and that contract’s relationship to spot is the dominant term in your return over anything beyond a day or two.

Three practical rules follow.

Define the holding period before you enter. VIX products are intraday-to-few-day instruments for retail traders. The roll cost is manageable over hours and punishing over months. If your plan has the words “and wait” in it, you do not have a plan, you have a subscription.

Check the curve shape. Steep contango means being long is expensive and being short is being paid, but being short volatility is exactly the position that can lose catastrophically in a single session, so the fact that it usually pays is not an argument for doing it casually. Backwardation means the roll favours long positions, but you only see it when the market is already stressed and prices are already elevated.

Respect the asymmetry. The VIX rises far faster than it falls. That makes short-volatility positions look wonderful in a track record and disastrous in a tail. February 2018 is the case study: a rapid spike destroyed a widely held inverse-volatility product almost entirely, in one session, and it was terminated.

The most common intermediate error is a subtler version of the beginner one: correctly identifying that volatility is cheap and then expressing that view in an instrument that charges for the wait. If you genuinely think a shock is coming, options on the underlying market let you define the cost and the time frame up front. A rolling futures position does not.

If you are experienced

For a professional, the VIX complex is a term-structure and risk-premium instrument, not a directional one. The persistent feature is the variance risk premium: implied volatility has historically exceeded subsequent realised volatility on average, which is why short-volatility strategies carry positive expectancy and negatively skewed returns. That is a premium for bearing tail risk, not an anomaly.

Three things dominate practical implementation. First, the roll yield term. Front-month and second-month spread dynamics determine the carry on any held position, and the spread between them is itself a widely watched regime indicator, sustained backwardation is one of the more reliable markers of genuine market stress rather than a routine pullback. Second, the beta of the front-month future to spot is well below one and varies with the level and shape of the curve, so any hedge ratio derived from spot VIX moves will be systematically wrong. Third, settlement mechanics matter: the special opening quotation is calculated from a specific auction process, and the basis behaves distinctively into that print.

On risk, the fundamental point is that short-volatility exposure has a return distribution with a long left tail that no amount of realised-volatility-based sizing will capture. Position limits should be set from stress scenarios, not from historical volatility. The 2018 episode demonstrated that the reflexivity between VIX futures and the hedging requirements of short-volatility products can produce moves far beyond what the underlying equity market justifies, the volatility market briefly became the driver rather than the derivative.

Retail CFDs on VIX futures deserve a specific warning at this level. They add broker spread and financing on top of an instrument that already carries structural decay, and the spread widens precisely in the conditions where the position is supposed to pay. Anyone with access to listed VIX futures, options, or options on the underlying index has strictly better tools. A CFD on a front-month volatility future is close to the worst available implementation of any volatility view.

Strategies that work on VIX (Volatility Index)

Short-term spike fade, small and fast : advanced only, and even then with defined risk

Because the VIX is mean-reverting, extreme spikes tend to decay. The classic approach is to fade a sharp spike, taking a short volatility position after a violent rise, and to hold it for hours or a small number of days as the panic subsides.

The reason this belongs in the advanced section is that the same behaviour that makes it usually profitable is what makes it occasionally ruinous. Volatility can spike again from an already elevated level, and short volatility positions lose fastest exactly when they are already losing. Position sizing must assume a further doubling is possible.

Never hold this position without a defined maximum loss you can survive, and never scale into it as it goes against you. Adding to a losing short-volatility position is the single most reliable account-destroying behaviour in this market.

Event-driven volatility, with a defined time frame : advanced

Volatility is typically bid into scheduled events (Federal Reserve decisions, CPI releases, elections) and crushed afterwards once uncertainty resolves. The trade is either to be long volatility into the build-up and out before the event, or to be short into the resolution.

The critical discipline is the exit. Being long volatility through the event itself is usually the wrong side of the trade, because the crush that follows the announcement frequently exceeds the move the event causes in the equity market.

This is a trade with a defined start and a defined end. If you cannot state both before you enter, you are not running this strategy.

Using the VIX as a signal rather than a position : everyone, and the most useful application for most traders

The most valuable thing the VIX does for the average trader is inform other decisions. It costs nothing, carries no roll, and cannot blow up.

Elevated and rising VIX means larger ranges, wider spreads and more slippage across every index and many currency pairs. That is a reason to reduce position size on the S&P 500, the Nasdaq or the DAX, to widen stops and cut size accordingly, and to be more sceptical of breakout setups. A compressed, falling VIX means tighter ranges and a better environment for mean-reversion approaches.

The shape of the futures curve adds a second layer: sustained backwardation is a genuine stress signal that has historically coincided with the more serious market declines rather than routine pullbacks.

Used this way, the VIX improves your risk management on instruments you already trade. That is worth considerably more to most traders than any attempt to trade it directly.

What not to do: the long-and-wait : nobody, included because it is the most common approach

This section exists because the single most popular retail VIX strategy is also the one that reliably loses money, and it deserves to be named rather than left implied.

The approach is: the VIX is low, buy a VIX product, wait for a crash, get rich. It fails because the contract you buy is already priced above spot, because contango erodes it every day you hold, because the roll to the next month charges you again, and because calm markets can persist for many months. The losses accumulate quietly while you feel patient.

If you genuinely believe a market shock is coming, the honest ways to express that are to hold less risk, to reduce leverage, or to buy defined-cost options on the market you actually care about, where you know your maximum loss and your time frame at the moment of purchase. A rolling long volatility position gives you neither.

Common mistakes on VIX (Volatility Index)

• Thinking you are buying the number on the chart. You are almost always buying a front-month future priced well away from spot, and it moves considerably less than the headline percentage, because the market expects spikes to fade before settlement.
• Buying it because it looks cheap and holding. Contango means you pay rent every day you wait, and calm markets can last for many months. This is the classic way to bleed an account slowly on the VIX.
• Ignoring the shape of the futures curve. The curve determines your carry. Entering a VIX position without checking whether it is in contango or backwardation is trading blind on the dominant term in your return.
• Treating short volatility as a safe income strategy. It usually pays and occasionally destroys. February 2018 wiped out a widely held inverse-volatility product almost entirely in a single session.
• Adding to a losing short-volatility position. Volatility spikes are reflexive and can accelerate. Averaging into them is the fastest documented route to a catastrophic loss in this market.
• Trading it outside US cash hours. The underlying options market is a US cash-hours market. Overnight VIX pricing is thin, wide and carries very little information.
• Using a CFD when listed instruments are available. A CFD adds spread and financing to an instrument that already decays structurally, and it widens exactly when you need it not to.

Risk and position sizing

Position sizing on VIX products has to start from an uncomfortable admission: the standard approach of sizing from recent volatility does not work here, because the instrument’s defining characteristic is that its volatility explodes. A position size that looks sensible against the last three months of quiet trading can be several times too large the first time the market has a bad week.

Start with the point value, which is larger than people expect. The standard listed VIX future has a multiplier of US$1,000 per index point and the mini contract US$100 per point, which means a single point of VIX movement, a routine daily occurrence, is a substantial sum. Retail CFD point values differ, so read the contract specification and then work backwards from the money you accept losing using the position size calculator. Never carry over a contract count from an equity index.

Then set your sizing from a stress scenario rather than an average one. For a long position, ask what happens if volatility simply grinds lower for four months while you pay the roll. For a short position, ask what happens if the VIX triples in two sessions, because it has done that, more than once, and the answer for most retail account sizes is that the position is fatal. If a plausible stress scenario would take out a large fraction of your account, the position is too big regardless of what the volatility calculation says.

Understand that stop-loss orders are less reliable here than almost anywhere else. In a genuine volatility event, spreads on VIX products widen enormously and liquidity thins at exactly the moment everybody wants out. A stop set at a comfortable distance can fill a very long way from its level. This is not a broker failing; it is what happens when a market repricing volatility has to trade through a thin book.

Finally, be clear about time. Every long VIX position has a clock running against it in normal market conditions. Decide your holding period before you enter, and treat the roll cost as a known expense rather than a surprise. If your thesis requires you to hold for months, this is the wrong instrument for your thesis.

Work the numbers before you enter with the position size calculator, the pip value calculator and the risk/reward calculator.

Where Market Structure Pro fits

An honest note first: Market Structure Pro is designed for trending and ranging analysis on price charts, and the VIX is a derived statistic with a structural decay term that no chart-based tool can see. MSP will not tell you that your position is in contango, and it cannot price the roll. Nothing can substitute for understanding the instrument itself, which is why most of this page is spent on that rather than on setups.

Where MSP does help on the VIX is the same place it helps everywhere: telling you when there is genuinely nothing there. Volatility products spend long periods drifting lower in slow, choppy conditions that produce an endless supply of tempting-looking reversal patterns. MSP’s dedicated ranging and chop filter exists to return NO TRADE in exactly those conditions, and on a decaying instrument, not trading is not a neutral outcome; it is the profitable one, because every day you are not holding is a day you are not paying the roll.

Session awareness matters unusually much here. VIX futures quote nearly around the clock, but the options market the index is calculated from trades during US cash hours. A setup appearing at 04:00 UK time is a setup in a market with almost nobody in it, and MSP grades it for those conditions rather than treating it as equivalent to a 15:00 signal. Its spread awareness is directly relevant too, because VIX spreads widen sharply outside US hours and during the volatility events people most want to trade.

The most valuable use of MSP alongside the VIX, though, is the other way round. Reading the VIX to understand what regime you are in, and using MSP’s verdict (TRADE, TRANSITION or NO TRADE, with a confidence percentage and an A/B/C grade) on the indices you actually trade, is a far better combination than trying to trade volatility directly. The VIX tells you how much risk is in the environment; MSP tells you whether the structure on your chart supports a trade in it.

MSP is decision support. It does not place trades, it is not a signal service, it guarantees nothing, and on this instrument in particular it cannot protect you from a structural cost that is built into the contract you are holding.

Frequently asked questions

What is the VIX?

The VIX is a volatility index calculated by Cboe from the prices of S&P 500 index options. It measures how much movement the options market expects in the S&P 500 over the next 30 days, expressed as an annualised percentage, so a VIX of 20 corresponds to roughly 20% annualised expected movement. It is a calculated statistic rather than a company or a basket of shares.

Can you buy the VIX?

No. The VIX index itself is not investable because it is a calculation, not an asset that anyone owns. What you can trade are VIX futures, options on those futures, exchange traded products built on those futures, and CFDs that brokers base on the front-month future. All of those behave differently from the index value you see quoted, and that difference is where most retail losses come from.

Why do VIX products lose value over time?

Because the VIX futures curve is usually in contango, meaning longer-dated contracts trade above nearer ones and above spot. As a contract approaches settlement its price converges towards spot, so a long position loses value even if the VIX is unchanged, and rolling into the next month pays that premium again. Over years this is why long-volatility exchange traded products have lost the great majority of their value.

What happens if I buy the VIX when it is low and wait?

You will usually lose money, and this is one of the best-documented ways retail traders bleed an account. You are not buying at the low spot level, because the future is already priced higher; you pay contango decay every day you hold; and calm markets can last many months, so the losses accumulate long before any spike arrives. Even when the spike comes, it often fails to recover the cost of the wait.

Is the VIX mean-reverting?

Yes. Unlike a share price, the VIX has an effective floor in the high single digits, because there is always some demand for S&P 500 options, and spikes decay back towards a long-run range rather than trending indefinitely. It has closed above 80 only during genuine crises, in 2008 and in March 2020. Mean reversion makes it a poor candidate for buy-and-hold or for trend-following.

What are the VIX trading hours?

The index value tracks the US cash equity session, 09:30 to 16:15 New York time, which is 14:30 to 21:15 UTC in winter and 13:30 to 20:15 UTC in summer since the US observes daylight saving. Cboe also publishes it during an extended global session from the early hours. VIX futures themselves trade close to 24 hours a day on weekdays, which is why brokers quote a price overnight.

Why does the VIX go up when the stock market falls?

Falling markets increase demand for downside protection, so investors buy S&P 500 put options, which raises option prices, which raises the calculated VIX. The relationship is strongly negative and clearly asymmetric: the VIX rises much faster on a market fall than it declines on an equivalent rally, because fear is bought urgently and complacency returns slowly.

Is shorting the VIX a good strategy?

It usually makes money and occasionally destroys accounts, which is a dangerous combination for anyone who judges a strategy by its win rate. The variance risk premium means implied volatility has historically exceeded subsequent realised volatility on average, so short positions are paid to bear tail risk. In February 2018 a rapid volatility spike caused a widely held inverse-volatility product to lose almost all its value in a single session and be terminated.

What is the best way for a beginner to use the VIX?

As information rather than as a position. A rising VIX signals wider ranges, larger spreads and more slippage, which is a reason to reduce position size and widen stops on the indices you already trade. A falling, compressed VIX signals tighter conditions better suited to mean-reversion approaches. Used this way the VIX costs nothing to hold and improves your risk management, which is worth more than trading it directly.

Related instruments

• S&P 500: The market whose options the VIX is calculated from: you cannot understand one without the other.
• Nasdaq 100: Higher-beta US index that typically moves more than the S&P when volatility spikes.
• Dow Jones 30: The more defensive US benchmark, useful for gauging how broad a volatility event really is.
• Gold: The other classic risk-off instrument, and one you can actually hold without a decay term.
• Russell 2000: Small caps usually suffer most when volatility rises, making it a useful stress cross-check.