Why is the VIX futures term structure usually in contango, and how does this create a structural drag for long VIX strategies?

The VIX futures term structure is typically in contango (upward sloping) because the market prices in a mean-reversion premium for volatility. Since spot VIX tends to revert toward its long-run average of approximately 19-20, futures at longer maturities price closer to this mean, creating a structural headwind for long VIX positions.\n\nWhy Contango Persists:\n\n1. Mean reversion: VIX tends to spike and revert. When spot VIX is at 14, the market expects it to drift toward 19 over the next few months, so the 3-month future trades at 17-18.\n\n2. Insurance premium: being long VIX provides portfolio crash protection. Buyers of this insurance pay a premium (above fair value) for this convex payoff.\n\n3. Variance risk premium: realized volatility is systematically lower than implied volatility, meaning volatility sellers earn a premium over time.\n\nRoll Yield Mechanics:\n\nA long VIX futures position must be rolled from the expiring contract to the next month. In contango, the new contract is more expensive.\n\nExample -- Northbridge Macro Fund holds long VIX:\n\n| Month | Front Month VIX Future | Second Month | Roll Cost |\n|---|---|---|---|\n| January | 15.20 | 17.40 | Buy at 17.40, sold at 15.20 = -14.5% |\n| February | 16.80 | 18.50 | Buy at 18.50, sold at 16.80 = -10.1% |\n| March | 14.90 | 17.10 | Buy at 17.10, sold at 14.90 = -14.8% |\n\nCumulative 3-month roll drag: approximately -35% annualized\n\nThis is why long VIX ETPs lose 50-80% of their value annually in calm markets, even if spot VIX is unchanged.\n\nTerm Structure States:\n\n| State | Description | Frequency | Implication |\n|---|---|---|---|\n| Contango | Futures > Spot | ~80% of time | Roll drag for longs |\n| Backwardation | Futures < Spot | ~20% (during crises) | Roll yield for longs |\n\nDuring a market crash, the term structure inverts to backwardation: spot VIX spikes to 35-40 while longer-dated futures stay at 25-28 (reflecting expected mean reversion). This is when long VIX positions pay off dramatically.\n\nQuantifying the Structural Cost:\n\nHistorical average annual roll cost for a front-month VIX long position: approximately -25% to -40% depending on the contango steepness.\n\nTo break even, the investor needs VIX spot to rise by more than the roll drag, which requires a significant market dislocation.\n\nTrading Implications:\n- Short VIX strategies harvest the contango roll yield but face devastating tail risk in crashes\n- VIX call options avoid roll drag (pay upfront premium instead) but are expensive due to the variance risk premium\n- Dynamic VIX allocation uses the term structure slope as a signal: enter long VIX only when backwardation signals an imminent crisis\n\nStudy volatility products in depth with our FRM course materials.