The VIX term structure is the VIX plotted across different time horizons: what the market is paying for volatility protection over the next nine days, one month, three months, and beyond. When longer horizons cost more than shorter ones, the curve slopes up (contango) and conditions are normal. When the short end costs more, the curve is inverted (backwardation) and someone is paying up for protection right now. The skill is not memorizing the definitions. It is knowing what the shape does and does not tell you before you place a trade.
TL;DR
- Contango means later-dated volatility is priced above nearer-dated volatility. It is the default state, not a bullish signal.
- Backwardation means near-term volatility is priced above later-dated volatility. It flags acute hedging demand, not a guaranteed selloff.
- Read the curve in order: spot VIX against the front future, the slope between adjacent expiries, then the VIX9D, VIX3M, VIX6M and VIX1Y gauges, then the S&P 500's price action.
- VIX options key off the matching VIX future, not spot VIX, so the curve changes your real at-the-money level and your carry.
- Treat the curve as a regime input alongside realized volatility, event calendars and liquidity, never as a one-variable timing system.
Table of Contents
- What the VIX term structure actually shows
- Contango vs. backwardation, in plain terms
- A four-step morning read of the curve
- What the curve cannot tell you
- How the curve changes VIX options trades
- Our perspective
- Putting the curve into a daily routine
- FAQ
- Sources
What the VIX term structure actually shows
The VIX itself is a single number: a 30-day estimate of S&P 500 volatility derived from SPX option prices. The term structure stretches that idea across maturities. According to Cboe's term-structure data, it shows the volatility expectations implied by SPX option prices from the time of calculation through regular third-Friday SPX expirations, and the live data updates roughly every 15 seconds during the trading day.
Cboe also publishes related constant-maturity gauges: VIX9D (nine days), VIX (30 days), VIX3M (three months), VIX6M (six months) and VIX1Y (one year). Together they give you a quick read of the whole curve without touching a futures chart.
Two curves people mix up
There are two related but different things behind the phrase:
- The SPX-implied volatility curve. The Cboe gauges above are derived from SPX options. This is the curve behind VIX9D, VIX, VIX3M and so on.
- The VIX futures curve. These are contracts whose prices reflect the market's estimate of where the VIX will be on future dates. They are related to the first curve, but they are not interchangeable with it.
Most charting sites show the futures curve (month one through month eight or so). Most "is the VIX inverted?" headlines use the VIX against VIX3M. Know which one you are looking at, because they can disagree on the same morning.
Contango vs. backwardation, in plain terms
A VIX futures curve is in contango when later-expiring futures are priced above nearer ones. It is in backwardation when nearer futures are priced above later ones. Per Cboe's analysis, this curve describes a relationship between futures prices and maturity dates. It does not promise that spot VIX will rise to every quoted futures price.
| Contango | Backwardation | |
|---|---|---|
| Shape | Upward sloping | Downward sloping or inverted at the front |
| What it implies | Calm now, more uncertainty priced further out | Stress now, relief priced further out |
| How common | More than 80% of observations since 2010 | Less than 20% of observations since 2010 |
| Typical VIX level | Below 20 | Above 30 |
| Duration | Tends to last longer | Tends to be shorter |
The frequency figures come from Cboe. The level pattern comes from research by Jablecki and coauthors, who report that VIX futures curves tend to be steeply upward sloping when the VIX is below 20 and steeply downward sloping when it is above 30. Those are study-specific historical thresholds, not trading rules. Their value is that they remind you to read slope together with the absolute level of volatility.
Why contango is the default
Volatility spikes are usually short-lived and tend to revert. Futures further out price in that reversion, plus a premium for bearing variance risk. So a calm market tends to show a curve that rises with maturity. A steep contango on a quiet Tuesday is the market behaving normally.
To see what "normal" looks like in practice, one public tracker reported that as of the close on October 15, 2026, the VIX was 16.46 and VIX3M was 18.49, a ratio of about 0.89, in contango. A ratio above 1.0 would mean the curve had inverted at that point.
A four-step morning read of the curve
If you trade before or around the open, you do not want a research project. Use this sequence, which follows how Cboe's live term-structure page lays out the data, including its date and time selector for comparing with prior sessions.
- Spot VIX versus the front future. If the front future sits above spot, the market is paying for near-term protection. If it sits below spot, the curve is inverted at the very front, which is the more urgent reading.
- The slope between adjacent expiries. Look at the gaps month to month. A steep first gap that flattens quickly is different from a curve that is flat all the way out.
- The Cboe gauges. Compare VIX9D, VIX3M, VIX6M and VIX1Y with spot VIX. If VIX9D is above VIX, the shortest horizon is the most stressed. If only the far end is inverted, that is a milder signal than a downward-sloping front end.
- Price action. Check the S&P 500 itself. A curve flattening while the index grinds higher is a different morning from a curve flattening during a gap down.
A front future above spot can signal near-term stress even when the rest of the curve still slopes upward. That is why step one comes first.
A worked example
Say spot VIX is 16.5, the front future is 17.4, the next is 18.3, and VIX3M is 18.5. Everything slopes up, the front future is only modestly above spot, and VIX9D is below VIX. That is a textbook calm regime. Now suppose overnight futures gap and the morning read shows VIX at 24, the front future at 23, and VIX9D above VIX. The slope has flipped at the front. That is a morning to cut position size, widen your stops in dollar terms, and check what is driving it before adding risk. (These numbers are illustrative, not a market quote.)
What the curve cannot tell you
Backwardation is not a sell signal
The common headline reading is that inversion means stocks are about to fall. Cboe's analysis of VIX backwardation shows it can coincide with major selloffs but can also appear during temporary stress followed by a quick equity recovery. Selling stocks short because the curve inverted can mean selling after the shock has already priced in. For more on how regimes change, see our guide to types of market conditions for options.
The curve is not a pure forecast
The academic work backs this up. Travis Johnson's paper in the Journal of Financial and Quantitative Analysis rejects the simple expectations hypothesis: the curve's shape carries information about the price of variance risk, and a slope component predicts excess returns on synthetic variance swaps, VIX futures and S&P 500 straddles. A steep curve is therefore not an unbiased probability that volatility will rise. It mixes expectations with a risk premium.
A 2024 PLOS ONE study points the same way: the curve has predictive value especially when anomalies revert toward the classic shape, with mean reversion and the volatility risk premium explaining the usual contango. The practical takeaway is to use the curve as a regime and relative-value input. Pair it with realized volatility, implied volatility rank, event dates and liquidity. Our guide to implied volatility rank covers one of those companion measures.
How the curve changes VIX options trades
This is where the term structure stops being theory and starts costing or paying you money.
Your at-the-money level is the future, not spot
A VIX option's practical reference is the price of its matching VIX future. Schwab gives an example where spot VIX was 16.08 while the /VX future was 17.53, so a 16-strike call was already in the money relative to the relevant future. Schwab also notes that VIX options are cash-settled and European-style, and that monthly and weekly expirations typically fall on Wednesdays.
If you pick strikes off spot VIX alone, you can misjudge moneyness and the hedge you think you own.
Convergence is a headwind or a tailwind
In contango, a future tends to drift down toward spot as expiration approaches. For a long VIX call, that is a headwind on top of time decay. In backwardation, the convergence can support long calls. So a long call bought in a steep contango is fighting two forces, and you need the spike to be large and quick enough to beat both. Our vega sizing rules and the explainer on options premium show how to account for that cost before you enter.
Using the curve for equity options
You do not have to trade VIX products to use the curve. Many traders use it as a backdrop for single-stock and index strategies:
- Contango with a low VIX: premium is cheap relative to the rest of the curve, which can favor defined-risk long-premium structures such as a straddle ahead of a known catalyst.
- Backwardation with an elevated VIX: near-term premium is expensive. Many traders lean toward defined-risk premium selling in longer dated cycles, such as the approach in our 30 to 45 DTE rules for high IV, but only with strict sizing.
- A curve that is changing fast: reduce size and review strategies built for volatile markets.
These are frameworks, not recommendations. Options carry risk, including the loss of your entire premium, and short premium positions can lose more than you collect. If you are unsure how a structure behaves, talk to a licensed financial professional before you size it.
The same logic applies across strikes: the term structure tells you about time, and the skew tells you about direction and tails. For the strike dimension, read our options skew workflow, and for how both fit together, the volatility surface article.
Our perspective
Most active traders we talk to are not full-time. They are professionals, tradespeople and business owners with a narrow window before the open. For them, the term structure is valuable precisely because it is fast: a thirty-second read tells you whether today is a normal day or a day to be careful.
But that is also where the trap sits. A single indicator is easy to over-trust. We built Morning Options around a multi-step AI pipeline that checks each idea against live market data, catalysts and a bear case, because a clean-looking setup can fall apart once you look at the event calendar or the volatility regime. The curve is one of those inputs. It sets the tone, and it should change how you size and which structure you choose. It should not be the reason you take a trade on its own.
Our rule of thumb: let the curve decide how aggressive to be, and let the specific contract, its entry level and its risk decide whether to trade at all.
— Customer
Putting the curve into a daily routine
The curve earns its place when it sits inside a repeatable routine rather than a gut check. A workable version for someone with limited time:
- Check the curve and the four steps above, and write down whether you are in contango, flat, or inverted.
- Note the VIX level against the 20 and 30 reference zones from the research, remembering they are not hard rules.
- Check the day's catalysts: earnings, economic releases, Fed speakers.
- Decide your size budget for the day, then look for ideas that fit it.
- For VIX options, convert everything to the matching future before choosing a strike.
If you want the catalyst and idea-ranking steps done before the open, our free daily briefing delivers ranked contract ideas with entry levels and a bear case. The Pro plan is $89 per month, or $742 per year, and adds the lunchtime scanner and an AI chat scanner for researching tickers on demand. You can see the free and Pro plans and start with the free tier.
FAQ
Is the VIX in contango or backwardation right now?
Check a live source, because the answer can change within a day. Cboe's term-structure page updates about every 15 seconds in trading hours and lets you select earlier dates. Historically, contango has been the norm, with Cboe reporting it in more than 80% of observations since 2010.
Does VIX backwardation mean the market will crash?
No. Backwardation signals acute demand for near-term protection. Cboe notes it can accompany big selloffs but also temporary stress followed by quick recoveries, so using it as an automatic short signal risks selling after the move.
Why is the VIX curve usually upward sloping?
Volatility tends to mean-revert after short spikes, and futures also embed a premium for variance risk. Research on the curve, including Travis Johnson's paper, finds that slope reflects the price of variance risk and not only expected future VIX.
Is the at-the-money strike on a VIX option based on spot VIX?
No, the practical reference is the matching VIX future. Schwab's example shows spot at 16.08 and the future at 17.53, which put a 16-strike call in the money relative to the future. Always check the future before choosing a strike.
Sources
- Cboe: VIX term structure data and charts
- Cboe: Is VIX backwardation necessarily a sign of a future down market?
- Charles Schwab: Trading the VIX
- Johnson, Journal of Financial and Quantitative Analysis
- PLOS ONE, 2024 study on the VIX curve
- Jablecki and coauthors on VIX futures curves
- VIX term structure tracker, October 15, 2026 reading