RIO volatility Rio Tinto Group
IV30Implied volatility interpolated to a constant 30-day horizon from the expirations around it, so different stocks and dates can be compared fairly.29.8%
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.19.3%
HV6026.5%
IV − HV20 spread
+10.4pt
Universe percentileWhere this IV30 ranks across all securities we cover today (a cross-sectional comparison, not the stock's own history).
27
Own-history percentileWhere today's IV30 sits versus its own daily history — 80 means higher than roughly 80% of recorded observations for that period.
29/60 days recorded
Cboe delayed options data · as of 22:01 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 |
|---|---|---|---|---|
| Nov 20, 2026 | 32 | 29.8% | +3.1pt | ±7.1% |
| Dec 18, 2026 | 60 | 29.5% | +2.8pt | ±9.6% |
| Jan 15, 2027 | 88 | 29.2% | +2.1pt | ±11.5% |
| Mar 19, 2027 | 151 | 30.4% | +3.2pt | ±16.3% |
| Apr 16, 2027 | 179 | 30.4% | +3.6pt | ±17.3% |
| Jun 17, 2027 | 241 | 30.7% | +2.8pt | ±19.8% |
| Sep 17, 2027 | 333 | 31.5% | +2.8pt | ±23.6% |
| Jan 21, 2028 | 459 | 31.3% | +3.3pt | ±27.1% |
Volatility smile — Nov 20, 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