Open Interest In Options Flow: Opening, Closing, Rolls, and Covers
How open interest helps classify options trades as opening, closing, rolls, overwrites, covers, or adjustments.
Why open interest matters
Open interest helps explain whether a trade is likely adding risk or reducing existing exposure. Size greater than prior open interest supports opening evidence, while size that closely matches existing OI can support closing or rolling evidence.
Expiry-day OI matches
When a same-day or near-expiry leg trades close to 100% of contract open interest, OptionsTape.Trade treats it as high-confidence evidence that the leg may be closing existing exposure, especially when paired with a later-expiry opening leg.
How rolls are inferred
A roll usually combines a closing leg and a new leg with related strike, expiry, option type, size, or economics. The system separates mechanical package structure from likely position intent.
Common mistake
Do not treat every large premium print as new bullish or bearish risk. A large leg can be a close, cover, overwrite roll, hedge replacement, or financing leg inside a package.