The implied volatility (IV) term structure is implied volatility plotted across option expiries, from the front-month contract out to the back-month. When it slopes upward, the market is pricing calm now and more uncertainty later, a state called contango. When it inverts, with near-dated options richer than longer-dated ones, that is backwardation, and it usually shows up in selloffs or right before a known catalyst. The shape, and how it moves, is a read on where the market expects turbulence to land in time.
What is the implied volatility term structure?
Every listed option carries an implied volatility, the level of future price movement the market is pricing into that contract. Group options by expiry, take a representative IV for each one, and plot those points along a time axis. The line you get is the term structure.
Read left to right, it answers a single question: how does the market's expected volatility change as you look further into the future? The front of the curve reflects what traders expect over the next days or weeks. The back reflects months out. The slope between them is the signal. A steep upward slope says near-term conditions look quiet relative to the longer horizon. A flat or downward slope says the near term is where the market expects the action.
This is distinct from the price of the underlying. The term structure is about the price of uncertainty, expressed in volatility terms, across calendar time.
What do contango and backwardation in the IV curve mean?
Contango is the normal, upward-sloping state. Near-term IV sits below longer-dated IV. The intuition is that the immediate future is somewhat knowable, while a longer horizon carries more room for the unexpected, so options that cover more time command a higher volatility premium. A market drifting through a quiet stretch typically shows contango.
Backwardation is the inverted state. Near-term IV trades richer than longer-dated IV, so the curve slopes down. This tells you the market is paying up for protection or exposure right now. Backwardation tends to appear during active selloffs, when traders scramble for short-dated hedges, or in the run-up to a scheduled event whose outcome lands soon. The market is effectively saying the next stretch is more dangerous than the months beyond it.
