オプションのインプライドボラティリティ (IV)

Plotting implied volatility across strikes for one expiry usually forms a 'smile' or 'skew': deep out-of-the-money options (especially puts) carry higher IV, reflecting the premium paid for tail-risk protection. Put skew signals fear; call skew signals squeeze/FOMO conditions.

ATM implied volatility across expiries. Contango (longer-dated IV above near-dated) is normal; inversion — near-month IV spiking above far months — signals event-driven short-term hedging demand.