Weekly BTC options market report · 168-hour comparison

Bitcoin options grow more defensive as volatility eases across maturities

Name: Weekly BTC options surface changes through 2026-09-12
Creator: Derivasys
License: https://www.derivasys.com/research-artifact-license/v1

BTC 1W ATM IV rose 1.21 volatility points; Skew moved toward puts (-1.51 vol points); partial native coverage (3/4 measurements) over the weekly window.

By Sean Gordon — Derivasys Research

Generated 12 Sept 2026, 16:45 UTC · Window 5 Sept 2026–12 Sept 2026

BF25 uses the average 25-delta wing premium over ATM across editions. Verified captured inputs supply the values in the report; unverified values are unavailable.

BF25 convention and original sources

Original constituent conventions are mixed or unverified. Each verified constituent is projected individually; Canonical BF25 unavailable where captured inputs cannot be verified. Original report and captured inputs remain unchanged. BF-specific historical ranks and unsupported commentary are withheld; they have not been recomputed.

Original edition headline

Bitcoin options grow more defensive as volatility eases across maturities

This is the original source headline, retained for audit. It is not a canonical BF25 finding.

BTC · Unverified original basis

Canonical BF25 unavailable: invalid-or-missing-captured-source-snapshot.

No validated 7D spot-index returns are available; displayed spot-index returns remain 24h. Surface changes use the stored weekly endpoints.

Snapshot data and comparison

Snapshot · 12 Sept 2026, 16:29 UTC

Generated timestamp: 2026-09-12T16:45:08+00:00

BTCSpot-index 24h Unavailable1W ATM IV 34.76%1W RR25 -0.37 vol pts1W BF25 Unavailable1W IV − 7D RV Unavailable

Previous report, watch levels and methodology

One-week surface context; the published headline retains its original evidence basis. Cutoffs 5 Sept, 16:29 UTC to 12 Sept, 16:29 UTC.

Measured change since prior report

Prior comparison unavailable: the published 2026-09-05 edition is verified but ends at 5 Sept, 18:43 UTC; this window requires 5 Sept, 16:29 UTC.

A structured watchlist was not recorded or could not be verified in the prior edition; prior-watch outcomes remain unavailable.

Next weekly cutoff: measurable checks

These checks are reconstructed from this edition’s stored endpoints; they were not recorded in the original report.

Hold the observed level: BTC 1W ATM IV ≥ 34.76 percent at 19 Sept, 16:29 UTC. Current level 34.76; threshold is the current observed endpoint.
Full retrace: BTC 1W ATM IV ≤ 33.55 percent at 19 Sept, 16:29 UTC. Current level 34.76; threshold is the previous observed endpoint.

Measurement basis and receipt

These are observed-level conditions for the next aligned cutoff, with no forecast or trade action. Spot uses exact index endpoints where available; ATM IV is quoted in percent and its change, RR25 and BF25 in volatility points. Derived from verified legacy artifact endpoints.

Original legacy edition JSON · SHA-256 9c201ddad5f66f6ecfdeff7cfd894bea7845ae74e1a59356705e9eb5181112ba

Prior artifact: /v1/btc/weekly/2026-09-05/721e3191daaba7312dd1e99fcd452477c473696052417fdf66c94e2c1995f757.json · SHA-256 721e3191daaba7312dd1e99fcd452477c473696052417fdf66c94e2c1995f757

Consumed endpoint proof: 94909f029908540d22b426a8cc2b6bc0d518cff29dccccce81bec2648706478b

BTC:atmIv:1W:observed-current-level: rows[asset=BTC].report.tenors[tenor=1W].atmIv.previous; rows[asset=BTC].report.tenors[tenor=1W].atmIv.current; rows[asset=BTC].report.tenors[tenor=1W].atmIv.change; evaluation window 2026-09-12T16:29:00+00:00 to 2026-09-19T16:29:00+00:00.
BTC:atmIv:1W:observed-previous-level: rows[asset=BTC].report.tenors[tenor=1W].atmIv.previous; rows[asset=BTC].report.tenors[tenor=1W].atmIv.current; rows[asset=BTC].report.tenors[tenor=1W].atmIv.change; evaluation window 2026-09-12T16:29:00+00:00 to 2026-09-19T16:29:00+00:00.

Chart notes

Combined surface read: ATM IV rose (BTC); RR25 moved toward puts (BTC).

Technical appendix: measurement and history provenance

Original edition evidence follows unchanged. Its BF slots retain the original full fly25 or unverified basis; these receipts do not validate canonical BF25 history or ranks.

Download original published edition and evidence receipts (JSON). Artifact SHA-256: 9c201ddad5f66f6ecfdeff7cfd894bea7845ae74e1a59356705e9eb5181112ba.

The week in markets.

Smile rotation is the fitted IV change at +0.15 log-moneyness minus the change at −0.15, in volatility points. A positive reading indicates a relative shift toward the call side.

These dated entries organise news across the calendar week. Related daily report links do not identify the stored reports reused in the weekly analysis; those inputs are listed separately.

Sunday 6 September