NDX Implied Volatility
NDX $29,273.40 · Updated Oct 26, 4:00 PM ET
NDX at-the-money implied volatility is 21.0% for Oct 27, 2026 (1 day out). For Nov 25, 2026 it is 23.0%. Longer-dated volatility is priced at or above near-term volatility, the normal upward-sloping term structure.
TERM STRUCTURE (ATM IV)
| Expiration | DTE | ATM strike | ATM IV |
|---|---|---|---|
| Oct 27, 2026 | 1 | 29275 | 21.0% |
| Oct 28, 2026 | 2 | 29275 | 24.6% |
| Oct 29, 2026 | 3 | 29275 | 27.3% |
| Oct 30, 2026 | 4 | 29275 | 27.6% |
| Nov 2, 2026 | 7 | 29275 | 23.1% |
| Nov 3, 2026 | 8 | 29275 | 23.5% |
| Nov 4, 2026 | 9 | 29275 | 24.3% |
| Nov 5, 2026 | 10 | 29275 | 24.5% |
| Nov 6, 2026 | 11 | 29275 | 24.9% |
| Nov 9, 2026 | 14 | 29275 | 23.3% |
| Nov 10, 2026 | 15 | 29275 | 23.6% |
| Nov 11, 2026 | 16 | 29275 | 23.7% |
SKEW, OCT 27, 2026
| Strike | Call IV | Put IV |
|---|---|---|
| 29210 | 22.8% | 20.1% |
| 29220 | 22.8% | 20.0% |
| 29225 | 22.8% | 19.9% |
| 29230 | 22.8% | 19.9% |
| 29240 | 22.7% | 19.8% |
| 29250 | 22.6% | 19.7% |
| 29260 | 22.5% | 19.6% |
| 29270 | 22.5% | 19.6% |
| 29275 | 22.4% | 19.5% |
| 29280 | 22.4% | 19.5% |
| 29290 | 22.3% | 19.4% |
| 29300 | 22.2% | 19.4% |
| 29310 | 22.1% | 19.1% |
| 29320 | 22.0% | 19.0% |
| 29325 | 22.0% | 19.1% |
| 29330 | 21.9% | 19.1% |
| 29340 | 21.8% | 18.9% |
How this is calculated: Implied Volatility methodology