# Unusual call open interest accumulation

Canonical: https://halfonadouble.com/screens/unusual-call-oi-accumulation
Data through: 2026-10-16 close
Publisher: Half on a Double

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

Positive daily call 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.

3 published matches, in the same order as the HTML screen.

| Ticker | Close (USD/share) | Open interest (contracts) | Call / put daily OI surprise |
| --- | --- | --- | --- |
| [ETN](https://halfonadouble.com/stock/ETN) | 391.25 | 123,796 | Calls +8.28σ · puts -3.24σ · Call change +39024 contracts |
| [JBS](https://halfonadouble.com/stock/JBS) | 13.03 | 198,146 | Calls +6.51σ · puts -0.25σ · Call change +63789 contracts |
| [KNX](https://halfonadouble.com/stock/KNX) | 64.81 | 161,941 | Calls +3.79σ · puts -1.81σ · Call change +21806 contracts |

An em dash means unavailable or not applicable, not zero. [Definitions and limitations](https://halfonadouble.com/methodology.md).