The options market is pricing an expected move of ±6.49% (±$15.65) for BIIB (Biogen Inc.) earnings on Wednesday, October 28, 2026 (before open). That is the mid price of the $240.00 at-the-money straddle expiring Friday, October 30, 2026, with BIIB at $240.98 as of Oct 21, 2026 3:59 PM ET (CBOE delayed data). Note: these option quotes are thin (wide or one-sided), so treat this figure as approximate.
| Earnings date | Wednesday, October 28, 2026 · Before open |
| Fiscal quarter | Sep/2026 |
| EPS forecast (consensus) | $2.04 (10 estimates) |
| Market cap | $35.9B |
| Straddle bid / mid / ask | $11.90 / $15.65 / $19.40 |
| Quote quality | Two-sided but wide spread (over 40% of mid) — approximate |
| Expiration used | Friday, October 30, 2026 (9 days out; 2 days after the report) |
| 85% convention | ±5.52% (±$13.30). Some sites quote 0.85 × straddle as a one-standard-deviation estimate. |
| Snapshot | 2026-10-21 |
Expected vs actual history
Expected is the move options priced in before each report; actual is how far BIIB really moved after it. The beat rate is how often the actual move was bigger.
No completed reports tracked yet. History began Wednesday, October 21, 2026 and builds as companies report; after BIIB reports, its actual move and whether it beat the expected move will appear here.
Moved more than expected
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No completed BIIB reports have been tracked yet (tracking began Wednesday, October 21, 2026), so there is no beat rate yet.
FAQ
What is the expected move for BIIB earnings?
The options market is pricing an expected move of ±6.49% (±$15.65) for BIIB (Biogen Inc.) earnings on Wednesday, October 28, 2026 (before open). That is the mid price of the $240.00 at-the-money straddle expiring Friday, October 30, 2026, with BIIB at $240.98 as of Oct 21, 2026 3:59 PM ET (CBOE delayed data). Note: these option quotes are thin (wide or one-sided), so treat this figure as approximate.
When does BIIB report earnings?
Biogen Inc. is scheduled to report on Wednesday, October 28, 2026, before open, per the Nasdaq earnings calendar. Dates can change; confirm with the company's investor relations site.
What price range does the BIIB expected move imply?
Using the $240.98 reference price and a ±$15.65 expected move, the implied range through Friday, October 30, 2026 is about $225.33 to $256.63. This is a market estimate, not a forecast.
How often does BIIB move more than expected after earnings?
No completed BIIB reports have been tracked yet (tracking began Wednesday, October 21, 2026), so there is no beat rate yet.
How is the expected move calculated?
It is the mid price (average of bid and ask) of the at-the-money call plus the at-the-money put in the first expiration that includes the post-earnings trading session, using CBOE delayed quotes. Dividing by the stock price gives the percentage.
Is this investment advice?
No. EarningsMoves publishes factual market data for information only. Quotes are delayed and may be inaccurate.