interactive volatility surface: x = expiry date · y = implied volatility · z = % move to strike
3D volatility surface (drag to rotate · scroll to zoom)
low IV
high IV
moneyness is shown as % move to strike = (strike − spot) / spot. +20% means the strike is 20% above the current price (the stock must rise 20% for the option to be at-the-money; OTM calls live here). −20% means the strike is 20% below spot (OTM puts live here). 0% = at-the-money.