Casey's General Stores, Inc. (CASY) IV/HV History
Comparing implied volatility to historical (realized) volatility reveals whether options are priced rich or cheap relative to actual price movement. Persistent gaps can signal trading opportunities.
Casey's General Stores, Inc. (CASY) operates in the Consumer Cyclical sector, specifically the Specialty Retail industry, with a market capitalization near $31.32B, listed on NASDAQ, employing roughly 49,848 people, carrying a beta of 0.61 to the broader market. Casey's General Stores, Inc. Led by Darren Rebelez, public since 1983-10-20.
Snapshot as of Aug 14, 2026.
- Spot Price
- $851.17
- ATM IV
- 38.8%
- HV 20-Day
- 25.6%
- HV 60-Day
- 51.4%
- IV Rank
- 34.7%
- IV Percentile
- 79.0%
As of Aug 14, 2026, Casey's General Stores, Inc. (CASY) ATM implied volatility is 38.8%. 20-day realized volatility is 25.6%, producing an IV-HV spread of +13.2 vol points. Options are pricing in more volatility than the stock has recently delivered, the volatility risk premium. IV rank is 34.7%.
How CASY iv/hv history Data Feeds Strategy Selection
Strategy selection on Casey's General Stores, Inc. options does not derive from any single metric in isolation. The iv/hv history view above sits inside a broader read: ATM IV currently sits at 38.8% and dealer gamma exposure is positive, so dealer hedging is mechanically mean-reverting. Combine the iv/hv history data here with the volatility-skew surface, dealer-gamma exposure, max-pain level, and upcoming-events calendar to build a positioning thesis. Risk-defined structures (credit spreads, debit spreads, iron condors) are usually safer than naked positions while the regime is uncertain; the data on this page anchors the inputs but does not by itself constitute a trade thesis.
How to read the CASY IV vs HV chart
The dual-line chart above tracks ATM implied volatility (forward-looking, what the chain is pricing) against 20-day realized historical volatility (backward-looking, what actually happened). ATM IV currently prints at 38.8%, 34.7% IV rank, against 25.6% realized over the trailing 20 trading days. Implied is pricing above realized by 13.2 vol points, the typical variance-risk-premium positive state in which premium sellers earn the gap. Persistent IV-above-HV is the variance-risk-premium-positive state typical of equity markets; persistent IV-below-HV is rare and usually marks underpriced vol that often expands.
CASY IV/HV regimes and trade selection
CASY IV rank at 34.7% sits mid-range - no structural edge from rank alone. Strategy choice should follow event calendar and the dealer-positioning read.
Using CASY vol history alongside the term structure
The IV/HV gap on this page captures the level of premium; the term-structure slope on the volatility page captures its shape across expirations. Backwardation (negative slope -0.040) indicates acute near-term event risk - near-dated tenors price disproportionate vol. Pair the rank read with the slope read with the event calendar to choose the right tenor for the structure.
CASY IV/HV signal in volatility-cycle context
Equity-vol cycles tend to compress and expand on multi-month timeframes: a typical sequence runs low-IV-rank consolidation (months of flat tape, decaying premium) into a vol-expansion catalyst (earnings miss, macro shock, regime change) into elevated-IV-rank stress (premiums fat, dispersion high) back to mean-reverting compression. CASY's 34.7% IV rank places the ticker in the mid-range of its 1-year window - no strong cycle-position signal. The ratio of HV-20 (25.6%) to HV-60 (51.4%) gives a second cycle indicator: when 20-day exceeds 60-day, recent realization is running hotter than the trailing-quarter average - typically a sign that recent days have already started expanding vol regardless of where IV rank prints. Use the time series above to spot inflection points: meaningful IV/HV gap closures and openings tend to precede regime shifts by a few sessions.
Learn how implied vs realized volatility is reported and how to read the data →
Daily ATM implied volatility and 20-day realized (historical) volatility for CASY over the last ~29 trading days. The IV-HV gap measures the variance risk premium - when IV trades persistently above realized HV, premium-sellers earn the spread; when IV dips below HV, vol is structurally underpriced.
Most recent 15 trading days (descending). Older history appears in the chart above.
| Date | ATM IV | HV 20d | HV 60d | IV Rank |
|---|---|---|---|---|
| Aug 14, 2026 | 38.8% | 25.6% | 51.4% | 34.7% |
| Aug 13, 2026 | 39.3% | 26.2% | 51.5% | 35.7% |
| Aug 12, 2026 | 39.3% | 32.7% | 51.5% | 35.7% |
| Aug 11, 2026 | 32.1% | 35.7% | 51.4% | 21.3% |
| Aug 10, 2026 | 33.3% | 35.2% | 51.3% | 23.7% |
| Aug 7, 2026 | 30.8% | 38.0% | 52.3% | 18.7% |
| Aug 6, 2026 | 31.5% | 38.0% | 53.4% | 20.1% |
| Aug 5, 2026 | 33.8% | 36.9% | 53.2% | 24.7% |
| Aug 4, 2026 | 35.6% | 37.1% | 53.5% | 28.3% |
| Aug 3, 2026 | 34.9% | 37.7% | 53.5% | 27.2% |
| Jul 31, 2026 | 33.0% | 36.7% | 53.4% | 25.9% |
| Jul 30, 2026 | 34.2% | 37.9% | 53.3% | 28.2% |
| Jul 29, 2026 | 34.8% | 42.0% | 53.3% | 29.4% |
| Jul 28, 2026 | 34.9% | 41.6% | 53.3% | 29.6% |
| Jul 24, 2026 | 33.8% | 41.7% | 53.3% | 27.5% |
Frequently asked CASY iv/hv history questions
- Is CASY options pricing rich or cheap right now?
- As of Aug 14, 2026, Casey's General Stores, Inc. (CASY) ATM IV is 38.8% against 20-day realized volatility of 25.6%. IV rank is 34.7%. CASY options are pricing in more volatility than the stock has recently realized: a positive variance risk premium worth 13.2 vol points.
- What is the CASY variance risk premium?
- The variance risk premium is the persistent gap between implied and subsequently realized volatility. In equity markets it averages positive because option sellers demand compensation for bearing variance shocks. CASY is currently priced consistently with this premium, which is one input to whether short-vol or long-vol structures carry their typical edge.
- What does CASY IV rank mean for strategy selection?
- IV rank normalizes the current ATM IV to its 1-year range: 0% is the low, 100% is the high. CASY's current rank of 34.7% signals where current pricing sits in its own 1-year history. High-rank regimes typically favor premium-selling structures (credit spreads, condors, covered calls); low-rank regimes typically favor premium-buying or long-volatility structures.