Oppty · Contract evidence
← Contract historyOI Formation & Direction
IWM · Jul 31, 2026 · $279 put
IWM260731P00279000
Two-stage assessment
Confirmed net formation
OI increased by 11 contracts after the source session.
- Initiation evidence
- Structure-contaminated · Ask-led
- Underlying implication
- Underlying implication unresolved
Settlement arithmetic
Formation window
- Source trade date
- June 26, 2026Tape session
- Baseline OI
- 390OI visible on source date
- Settlement observation
- June 29, 2026Next returned trading row
- Settled OI
- 401Next observation
- OI change
- +11Settled minus baseline
- Trade-day volume
- 16Bound denominator
- Net-formation ratio
- 68.75%OI change ÷ volume
Bound-first attribution
Side partitions & lower bounds
Each raw bound is max(0, OI change − (volume − side volume)).
A positive value is the minimum net formation forced into that quote-side bucket.
- Ask
- 7Raw lower bound: 2
- Bid
- 6Raw lower bound: 1
- Mid
- 3Raw lower bound: 0
- Neutral
- 0Raw lower bound: 0
- Clean ask
- 0Side volume after allowing all flagged structure to contaminate this bucket
- Clean bid
- 0Side volume after allowing all flagged structure to contaminate this bucket
Conservative allowance
Flagged structure
The clean dominant-side bound allows every flagged contract to contaminate that side. Because flags can overlap, their sum is capped at daily volume.
- Multileg
- 10Flags may overlap
- Stock multileg
- 0Flags may overlap
- Cross
- 0Flags may overlap
- Floor
- 0Flags may overlap
- Clamped structure allowance
- 10Sum capped at total volume
Context only
Intraday corroboration
Minute clustering, premium, and IV describe the tape. They cannot create or increase a mathematical bound.
- Active minutes
- 10Returned minute buckets
- Largest minute
- 425.00% of daily volume
- Ask/bid premium imbalance
- +11.46%Positive is ask-premium led
- IV range
- 27.07% – 27.94%Descriptive only
- Daily reconciliation
- ReconciledMinute side totals versus daily side totals
Interpretation boundaries
What this report cannot verify
Motive and identity remain unknown
These aggregates cannot distinguish speculation, hedging, overwriting, participant capacity, or verified open/close labels.
Conditional dealer mechanics
If a dealer was the counterparty, carried this position without portfolio offsets, and delta-hedged it, the mechanical scenario could require the dealer to sell underlying. This is not verified flow.
confirmed_net_formation
structure_can_explain_side_bound