Biggest Skew Change

As of April 21, 2026 (end-of-day snapshot). Pages update daily after the market close.

Where the 25-delta put-call skew has shifted most sharply from the prior session. Steepening typically signals fresh crash-protection demand — institutional hedging loading or retail put buying on news. Flattening often signals complacency or forced short-vol sellers covering.

Top 50 by Δ Skew

The live skew-change leaderboard loads after the page hydrates. Rows are ranked by absolute day-over-day change in 25-delta put-call skew.

Methodology

Computed as today's 25Δ skew − prior session's 25Δ skew. Ranked by |Δ| descending. Same eligibility filters as the level screener. Requires two consecutive sessions.

Frequently Asked Questions

How big is a meaningful change?

For single stocks, 0.5 vol-point day-over-day is noise; 1.0–1.5 is meaningful; above 2.0 is extreme. Index thresholds are tighter.

Is steepening always bearish?

Not necessarily. Steepening can occur from retail call demand collapsing (calls cheapen without puts richening) or from dealer-hedging shifts. Direction comes from price action, not skew alone.

Does this duplicate biggest-iv-change?

No. IV change tracks the overall level. Skew change tracks the ASYMMETRY across strikes. Unchanged ATM IV with massive skew shift = classic puts-loading regime.

Why the liquidity gate?

Thin chains produce noisy skew estimates from small OI imbalances rather than real positioning change. The floor filters those out.