Unusual put open interest accumulation

Which put OI increases were unusually large for their own ticker on Oct 16, 2026?

Positive daily put contract changes at least two standard deviations above their preceding-year norm. Requires at least 200 prior observations and 100,000 current total contracts. Calls and puts are standardized separately. More open contracts do not establish who bought or sold them. Data through Oct 16, 2026 close. Descriptive only, not a recommendation.

At a glance

2 tickers qualified. First five: TGB (Calls -1.06σ · puts +9.95σ · Put change +6071 contracts), IYR (Calls -2.40σ · puts +5.51σ · Put change +44609 contracts).

Unusual put open interest accumulation as of Oct 16, 2026 close
#	Ticker	Close	Open interest	Call / put daily OI surprise
1	TGB	7.97	101,876	Calls -1.06σ · puts +9.95σ · Put change +6071 contracts
2	IYR	97.39	191,092	Calls -2.40σ · puts +5.51σ · Put change +44609 contracts

Screens describe what the data shows after the close. They are not trade recommendations; see the disclaimer and the methodology.