VIX Trading Rules: From Reading to Execution
Turn VIX readings into executable rules with concrete entry thresholds, hedge ratios, and volatility-product selection for long and short vol trades.
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VIX Trading Rules: From Reading to Execution
Most traders read the VIX but never trade it. The gap between interpretation and execution is where money is lost. Below are concrete rules that convert VIX signals into positions with defined risk.
Long Volatility Triggers
Enter long-vol exposure only when at least two of these fire:
- Spot VIX spikes above 30 intraday on a session where SPX is down more than 1.5%.
- VIX futures curve flips to backwardation (front month above second month by 0.5 points or more).
- VIX registers a 2-standard-deviation expansion over a 20-day window.
Sizing rule: risk no more than 0.5% of equity per long-vol trade, because volatility products gap and gap risk is asymmetric.
Short Volatility Triggers
Short-vol is a carry trade, not a directional bet. Harvest premium only when:
- VIX is above 18 and the front-month futures are in contango of 0.3 points or greater.
- The 10-day moving average of VIX is rising but spot has not exceeded 25.
Exit short-vol immediately if the curve moves to backwardation. Hold no short-vol position into a CPI or FOMC release.
Product Selection
| Goal | Instrument | Why |
|---|---|---|
| Directional long vol, defined risk | VIX call options | No contango drag, fixed premium |
| Hedge long equity book | VXX calls, 30-60 DTE | Tracks front month, decays slower than UVXY |
| Short vol carry | SVIX or put spreads on VXX | Capped downside, daily rebalance drag works for you |
Avoid UVXY for holds beyond 5 sessions. Its 2x daily rebalance erodes value even when VIX rises.
Hedge Ratio Sizing
To hedge an SPX long book with VIX calls, use a rough ratio: one at-the-money VIX call contract per $100,000 of SPX exposure, 30 DTE. This is not a perfect delta hedge but captures the convexity spike during a sell-off. Re-hedge weekly as delta shifts.
Exit Rules
- Long vol: take profit when VIX mean-reverts to its 20-day MA, or when backwardation closes back into contango.
- Short vol: exit at 50% of max profit on the put spread, or at the backwardation stop.
What Kills VIX Traders
Holding long-vol through calm regimes bleeds capital via contango. Holding short-vol through a vol spike blows up the account. Both failures come from treating the VIX as a directional bet rather than a regime-dependent tool. Define the regime first, then choose the trade.
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