Positioning & Flow
Unusual Options Activity (UOA)
Also called: UOA, unusual activity
Unusual options activity is option volume or premium that is abnormal for the ticker: volume well above its average, volume exceeding open interest at a strike, or unusually large single trades. It flags where new, sizable positioning is happening.
The common tests are volume versus 30-day average volume, volume versus open interest (which indicates opening trades), premium versus the ticker's typical trade size, and concentration in short-dated or far out-of-the-money strikes. Scanners rank prints by these factors and by execution side.
UOA identifies attention, not direction or outcome. A meaningful share of unusual prints are hedges or one leg of a spread, so the strongest workflows confirm with the counterpart legs, the next day's open interest change, and the underlying's reaction.
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Frequently asked questions
Does unusual options activity predict stock moves?
Sometimes, particularly aggressive, opening, short-dated call buying ahead of news. Studies find modest predictive value on average with large variance; treat it as one input rather than a signal.