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A corridor variance swap pays realized variance only when the underlying trades within a specified price range (corridor). Days when the price is outside the corridor do not accumulate variance, limiting the seller's exposure to tail moves.
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Key takeawayCorridor variance swaps conceptually mirror the premium seller's ideal outcome: getting paid for realized vol within a range while being protected from extremes. Iron condors approximate this payoff in listed markets.
💡 Why It Matters
Corridor variance swaps demonstrate the concept of range-bound volatility selling with built-in tail protection. Iron condors and iron butterflies are the listed-market approximations of this payoff, making the concept directly relevant to premium sellers.
⚙ How It Works
The swap accumulates realized variance only on days when the underlying trades within a specified price corridor. If the underlying gaps outside the corridor, no variance accumulates for that day. The seller profits when realized variance within the corridor is less than the strike variance.
📋 Example
A corridor variance swap on SPX has barriers at 4200-4600 with a strike of 15% vol. SPX spends 25 out of 30 days within the corridor, with realized vol of 12% on those days. The 5 days outside the corridor do not count. The seller profits from the 3-point vol difference on 25 days.
⚠ Common Mistakes
Traders assume iron condors perfectly replicate corridor variance swaps. Unlike corridor variance swaps, iron condors have discrete strike barriers and fixed maximum losses. The conceptual similarity is useful for understanding the payoff, but the risk profiles differ at the edges.
❓ FAQ
What is Corridor Variance Swap?
A corridor variance swap pays realized variance only when the underlying trades within a specified price range (corridor). Days when the price is outside the corridor do not accumulate variance, limiting the seller's exposure to tail moves.
Why does Corridor Variance Swap matter for premium sellers?
Corridor variance swaps conceptually mirror the premium seller's ideal outcome: getting paid for realized vol within a range while being protected from extremes. Iron condors approximate this payoff in listed markets.
How does Corridor Variance Swap work?
The swap accumulates realized variance only on days when the underlying trades within a specified price corridor. If the underlying gaps outside the corridor, no variance accumulates for that day. The seller profits when realized variance within the corridor is less than the strike variance.
What are common mistakes with Corridor Variance Swap?
Traders assume iron condors perfectly replicate corridor variance swaps. Unlike corridor variance swaps, iron condors have discrete strike barriers and fixed maximum losses. The conceptual similarity is useful for understanding the payoff, but the risk profiles differ at the edges.
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This is not financial advice. Read our full investment disclaimer.