Volatility Shock Lab - Updated 2026-07-31

What Happens When Volatility Disappears Overnight?

Use a transparent Black-Scholes-style approximation to separate option value before, value after, directional move, time decay, and volatility contraction.

Reviewed/updated 2026-07-31 Educational use only Transparent formulas No live prices or individualized advice

Implied-Volatility-Crush Simulator

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Use a transparent Black-Scholes-style approximation to separate option value before, value after, directional move, time decay, and volatility contraction.

Public formula: Approximation uses Black-Scholes with zero rates and no dividends. It is an estimate, not a live quote.
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Fast answer

If a call gains intrinsic value from a stock move but implied volatility falls sharply, the lost extrinsic value may offset part or all of the directional gain.

The useful question is not whether one metric looks good. It is whether the full risk, reward, cost, timing, and recovery math still make sense when the trade behaves badly.

Action checklist

  • Compare IV before and after the catalyst.
  • Estimate the move needed to beat vega loss.
  • Check time remaining and spread width.
  • Avoid assuming direction alone determines option P/L.

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