AMT volatility American Tower Corporation
IV30Implied volatility interpolated to a constant 30-day horizon from the expirations around it, so different stocks and dates can be compared fairly.25.6%
HV20How much the stock actually moved, measured from daily closing prices over a past window (annualized). Compare with implied volatility to see what the options market priced versus what happened.19.7%
HV6028.8%
IV − HV20 spread
+5.8pt
Universe percentileWhere this IV30 ranks across all securities we cover today (a cross-sectional comparison, not the stock's own history).
29
Own-history percentileWhere today's IV30 sits versus its own daily history — 80 means higher than roughly 80% of recorded observations for that period.
3/60 days recorded
Cboe delayed options data · as of 09:33 UTC · How these are computed
IV term structure
At-the-money implied volatility for each listed expiration, plotted by days remaining.
| Expires | DTE | ATM IV | 25Δ skewThe IV gap between 25-delta puts and 25-delta calls for one expiration. Positive skew means downside protection is priced richer than upside exposure. | Implied move |
|---|---|---|---|---|
| Sep 18, 2026 | 15 | 23.7% | -0.6pt | ±4.1% |
| Oct 16, 2026 | 43 | 26.1% | +1.0pt | ±7.5% |
| Nov 20, 2026 | 78 | 28.9% | +3.8pt | ±10.8% |
| Dec 18, 2026 | 106 | 26.6% | +2.4pt | ±11.6% |
| Jan 15, 2027 | 134 | 26.2% | +2.9pt | ±12.9% |
| Mar 19, 2027 | 197 | 26.9% | +2.1pt | ±15.8% |
| Apr 16, 2027 | 225 | 26.8% | +2.0pt | ±16.9% |
| Jun 17, 2027 | 287 | 27.2% | +2.6pt | ±19.1% |
| Sep 17, 2027 | 379 | 27.5% | +2.8pt | ±21.9% |
| Oct 15, 2027 | 407 | 27.8% | +3.1pt | ±22.7% |
| Jan 21, 2028 | 505 | 28.1% | +2.6pt | ±25.3% |
| Apr 21, 2028 | 596 | 29.1% | +4.3pt | ±28.1% |
Volatility smile — Sep 18, 2026
Implied volatility by strike. The tilt toward puts (left side higher) is the skew: downside protection priced richer than upside.
callsputs
Implied vs realized, daily record
IV30HV20