Weekly data bulletin · Series E — Volatility changes
Biggest IV Movers This Week
According to ApexVol data as of 2026-07-17, comparing against the 2026-07-10 snapshot: ANNX posted the week's biggest volatility spike, its IV rank jumping +91.0 points to 94.0 (30-day IV 165.9% → 194.3%). BMNU saw the deepest crush, -85.0 rank points to 13.0. Across 1149 liquid names, 153 spiked 20+ IV-rank points week-over-week and 100 crushed 20+. IV moves for a reason — check for earnings, FDA dates or M&A before trading these.
Data as of 2026-07-17Compared to 2026-07-10Universe 1149 liquid namesSource ORATSCadence Weekly · Mon
+91.0
Biggest spike (ANNX), IV-rank pts
-85.0
Deepest crush (BMNU), IV-rank pts
153
Names spiking 20+ pts
100
Names crushing 20+ pts
Exhibit 01
Spikes Right, Crushes Left
The biggest week-over-week changes in 1-year IV rank across 1149 liquid US
stocks, both directions in one table. IV moves for a reason — check each name for earnings,
trial readouts or deal news before trading the change.
Note — Δ IV rank = change in 1-year IV percentile between the 2026-07-10
and 2026-07-17 snapshots; bars scale each change against the week's largest.
Changes under 5 points are treated as noise and excluded.
Source: ORATS, as of 2026-07-17.
Exhibit notes
Methodology
Source
ORATS live + historical cores
Comparison
2026-07-10 snapshot
Universe
1149 liquid optionable names
Noise floor
±5 IV-rank points
Both snapshots come from ORATS:
the current read from the live cores feed, the prior week from ORATS historical cores for
2026-07-10. Universe: liquid optionable US names (price above $5, 20-day average
options volume of at least 1,000 contracts).
IV rank (1-year IV percentile) is compared point-in-time
to point-in-time; the table shows the 24 largest
absolute changes, both directions, with drift under 5 points excluded as noise. A spike usually
means a catalyst has appeared on the calendar; a crush usually means one has passed — see
IV crush. Generated every Monday before the US open.
AV
Written by
ApexVol Research Team
Quantitative options research
All calculations use live ORATS institutional data — the same source used by professional volatility desks.
RS
Technical reviewer
Ryan Silk, ApexVol Founder
Reviewed for technical accuracy
10+ years trading options. Built ApexVol's pricing engine, Greeks model, and IV-rank methodology.
This guide is updated as market conditions and ORATS data change. Last revised 2026-07-17.How we research →
Citation
Cite This Data
ApexVol Research. “Biggest IV Movers This Week (Jul 17 – 23, 2026).” ApexVol, 2026-07-17. https://apexvol.com/reports/iv-movers-this-week
Free to cite with attribution · page refreshes weekly — cite the week label for reproducibility
FAQ
Frequently Asked Questions
As of 2026-07-17, the biggest implied volatility movers versus the 2026-07-10 snapshot are ANNX, TOYO, ECHO. The full spike-and-crush table refreshes every Monday.
IV rises when the options market starts paying up for future movement — most commonly ahead of a scheduled catalyst (earnings, FDA decisions, court rulings, product events) or after an unscheduled shock (M&A news, guidance cuts, macro stress). A spike is information, not a signal by itself: it usually means an event is now on the calendar or the market has repriced the stock's risk.
A crush usually means the awaited event has passed and the uncertainty premium has deflated — the trade that profits from it (selling premium before the event) is already over. Post-crush, option prices are cheaper for directional buyers, but often for good reason: the catalyst is gone. Comparing post-crush IV against realized volatility tells you whether the deflation overshot.