Term Structure Trade (Volatility)
A volatility term structure trade is an options or volatility derivatives strategy that profits from changes in the shape or slope of implied volatility across different expiration dates, rather than from the overall level of volatility or the direction of the underlying asset.
Implied volatility is not a single number — it is a surface defined across both strikes and maturities. The term structure specifically refers to how implied volatility changes as you move from shorter to longer expiration dates, holding the strike constant or using at-the-money options as the reference. Under normal market conditions, the term structure is typically upward sloping: short-dated implied volatility is lower than long-dated implied volatility, reflecting mean reversion in realized volatility and the additional uncertainty embedded in longer horizons.
During acute market stress, the term structure frequently inverts: the VIX — a measure of 30-day implied volatility — spikes sharply while longer-dated implied volatility indexes such as the VIX3M (93-day VIX) or VIX6M rise less dramatically. The result is a backwardated or inverted term structure. In calm, low-volatility environments, the front of the term structure may be depressed relative to the back, producing steep contango. Traders who take views on these slope changes implement volatility term structure trades.
The most direct implementation uses VIX futures spread trades at CBOE Futures Exchange. Buying the front-month VIX futures contract while selling the next-month contract creates a calendar spread that profits if the term structure steepens or moves from contango into backwardation. The reverse spread profits from flattening or further contango. VIX calendar spreads are actively traded by volatility hedge funds managing exposure to the timing of volatility regimes.
Options-based term structure trades use calendar spreads on S&P 500 index options: selling a short-dated straddle while buying a longer-dated straddle at the same strike. If the term structure is unusually flat and expected to steepen, this structure profits as short-dated implied volatility declines relative to long-dated. The trade has vega exposure to the slope difference between the two maturities rather than to the aggregate level.
Volatility term structure trades are also informed by event calendars: Fed meetings, earnings seasons, presidential elections, and other known event dates create local implied volatility spikes in expirations surrounding the event. Traders who believe the market is over- or under-pricing specific events sell or buy the relevant expiry and hedge against the adjacent expirations, constructing localized term structure positions that depend on the realized event impact relative to the priced-in volatility premium.