# One Strike, One Night: Reading Overnight Open Interest

Source: https://squawkflow.com/videos/oi-jump-overnight
Retrieved: 2026-10-17T16:08:08.322Z
Uploaded: 2026-10-16
Duration: 2:16
Topic: Options Basics
Video file: https://storage.googleapis.com/squawkflow-videos/oi-jump-overnight/oi-jump-overnight-db2c0b27.mp4
Captions: https://storage.googleapis.com/squawkflow-videos/oi-jump-overnight/captions-2563564e.vtt

One strike's share of a symbol's net open interest change on a dated SquawkFlow page, aggregates only, and what the count can't say. AI voice.

AI voice: the narration is a synthetic voice reading a script SquawkFlow wrote. Educational only, not investment advice. Nothing here is a forecast or a recommendation to trade.

## Chapters

- 0:00 One strike, one night (https://squawkflow.com/videos/oi-jump-overnight?t=0)
- 0:17 What the page counts (https://squawkflow.com/videos/oi-jump-overnight?t=17)
- 0:39 Where the change landed (https://squawkflow.com/videos/oi-jump-overnight?t=39)
- 1:22 The caveat (https://squawkflow.com/videos/oi-jump-overnight?t=82)
- 1:50 Wrap (https://squawkflow.com/videos/oi-jump-overnight?t=110)

## Related

- Explainer: https://squawkflow.com/learn/change-in-open-interest-options
- Tool page: https://squawkflow.com/oi-change

## Transcript

# One Strike, One Night: Reading Overnight Open Interest

Narration: AI voice.

### One strike, one night

One strike. One night. about 62 percent of TLT's net call open interest change at the Oct 14, 2026 settlement sits on a single strike. And the page's own caveat is the punchline.

### What the page counts

The page: settled open interest from Cboe, compared settlement to settlement, updated once a session. Figures are contracts, not dollars. The archive holds no option prices. 210 symbols compared. Net change, +6,501,270 contracts.

### Where the change landed

Where did it land? Page-wide, calls netted +3,099,327 contracts, puts +3,401,943. By symbol, the largest net increase was SPY, +1,138,355. Now TLT. Net +301,493, and +279,093 of that in calls. Then the top strike on the page, summed across every expiry: TLT 85 calls, +172,459, over 28 expirations. That's about 62 percent of TLT's net call change. One strike.

### The caveat

Now the caveat, in the page's own words. Open interest change, not trades. It does not say which side opened or closed. Every new contract has a holder and a writer. A call build counts the same for a new long call, a covered call written against stock, one leg of a spread, or a hedge rolled from another expiry. No side. No price. No dollars.

### Wrap

Open interest is counted once a day, after the close, and posted the next morning. So this is a dated count, Oct 14, 2026 against Oct 13, 2026. Not a trade tape, not a forecast. How to read the change is on the learn page in the description. Educational only.

Full write-up with sources: [/learn/change-in-open-interest-options](/learn/change-in-open-interest-options)

Educational content, not investment advice.

Levels shown are as captured on 2026-10-16 01:44 ET; they are not current.