Health Care
Biogen Inc (BIIB) options and signal
Figures as of 28 Sep 2026
BIIB is Biogen Inc, a Health Care name the model ranks every trading day. The options figures are from the close on 28 Sep 2026. The model's figures are from 25 Sep 2026, one trading day behind the latest, as the Free plan shows them. Every model figure is paper trading.
Membership gets tonight's signals the night they publish. Free gets every options screen, never delayed, and the signals one trading day behind.
At a glance
| Figure | Value | Date |
|---|---|---|
| IV rank | 94 of 100 | 28 Sep |
| At the money IV | 45.5% | 28 Sep |
| Priced move to 30 Oct | 13.2% down, 13.1% up | 28 Sep |
| Call wall and put wall | 230 and 200 | 28 Sep |
| Signal and the desk's view | No signal, view bearish | 25 Sep |
| Last close | 228.69 | 28 Sep |
| Next report | 28 Oct 2026 | 28 Sep |
Options Snapshot
BIIB's IV rank is 94 of 100 on 28 Sep 2026.
| Figure | Value |
|---|---|
| IV rank | 94 of 100 |
| At the money IV | 45.5%, near month, 32 days |
| Put/call ratio, open interest | 0.50 |
| Call open interest, strikes captured near the price | 15,800 contracts |
| Put open interest, strikes captured near the price | 7,900 contracts |
| Cost to trade at the money | Wide, 53.3% of the option's mid price |
IV rank is where the at the money IV sits among BIIB's own weekly readings, 0 the lowest and 100 the highest.
From the option chain at the close on 28 Sep 2026. Current on every plan.
Open Options Snapshot in RingMasterThe Options Snapshot guide
Priced Range
On 28 Sep 2026, BIIB options priced a move of 13.2 percent down and 13.1 percent up by 30 Oct 2026.
| Expiry | Days | Down | Up | Range |
|---|---|---|---|---|
| 2 Oct 2026 | 4 | 4.3% | 5.2% | 218.94 to 240.59 |
| 9 Oct 2026 | 11 | 8.9% | 6.9% | 208.39 to 244.49 |
| 23 Oct 2026 | 25 | 10.5% | 9.6% | 204.79 to 250.69 |
| 30 Oct 2026 | 32 | 13.2% | 13.1% | 198.59 to 258.69 |
| 18 Dec 2026 | 81 | 19.9% | 20.8% | 183.09 to 276.29 |
| 15 Jan 2027 | 109 | 21.6% | 23.6% | 179.39 to 282.59 |
| 16 Apr 2027 | 200 | 30.5% | 33.1% | 158.99 to 304.29 |
The range is one standard deviation either side of the close of 228.69, as the option prices imply it.
A priced move restates option prices at the close and says nothing certain about where the price goes.
From the option chain at the close on 28 Sep 2026. Current on every plan.
Gamma Map
On 28 Sep 2026, BIIB's call wall is the 230 strike and its put wall is the 200 strike.
| Figure | Value |
|---|---|
| Call wall, most open call gamma | 230 |
| Put wall, most open put gamma | 200 |
| Net dollar gamma, calls minus puts | $4.6 million |
| Total dollar gamma, both sides | $8.91 million |
| Close | 228.69 |
Dollar gamma is stated for a one percent move in the price.
Net is calls minus puts under the standard convention, not a record of who holds the contracts.
Net gamma changes sign at 7 strikes, so no single flip strike is named.
From the option chain at the close on 28 Sep 2026. Current on every plan.
Volatility History
On 28 Sep 2026, BIIB's at the money IV is 45.5 percent against 20 day realized volatility of 25.9 percent.
| Figure | Value |
|---|---|
| At the money IV | 45.5% |
| Realized volatility, 20 trading days | 25.9% |
| Realized volatility, 60 trading days | 36.3% |
| IV against its own weekly record | High, in the top fifth |
| Weekly readings on record | 864, from 8 Jan 2010 |
| Weeks the price moved more than the one week priced move | 19.4% of 252 weeks |
Realized volatility is worked out from the daily closes the desk holds, not from the option chain.
From the option chain at the close on 28 Sep 2026. Current on every plan.
Open Volatility History in RingMasterThe Volatility History guide
Volatility Weather
On 28 Sep 2026, BIIB's at the money IV runs from 46.4 percent at 4 days to 41.2 percent at 200 days.
| Days to expiry | At the money IV |
|---|---|
| 4 | 46.4% |
| 11 | 42.3% |
| 18 | 39.0% |
| 25 | 38.1% |
| 53 | 41.2% |
| 81 | 41.8% |
| 109 | 41.0% |
| 200 | 41.2% |
Near expiries price more volatility than far ones, an inverted term structure.
From the option chain at the close on 28 Sep 2026. Current on every plan.
Open Volatility Weather in RingMasterThe Volatility Weather guide
Volatility Smile
On 28 Sep 2026, at the 32 day expiry, BIIB's IV ten percent below the price sits 5.8 points above at the money IV.
| Strike area | Implied volatility | Against at the money |
|---|---|---|
| 10% below the price | 51.3% | +5.8 points |
| At the money | 45.5% | 0.0 points |
| 10% above the price | 42.1% | -3.4 points |
From the option chain at the close on 28 Sep 2026. Current on every plan.
Open Volatility Smile in RingMasterThe Volatility Smile guide
Volatility Surface
On 28 Sep 2026, BIIB's surface spans 10 expiries out to 200 days, with IV from 35.6 to 63.7 percent near the price.
| Figure | Value |
|---|---|
| Expiries captured | 10 |
| Nearest expiry | 2 Oct 2026, 4 days |
| Farthest expiry | 16 Apr 2027, 200 days |
| Points within 10% of the price, 7 days out or more | 70 |
| Lowest IV among them | 35.6% |
| Highest IV among them | 63.7% |
From the option chain at the close on 28 Sep 2026. Current on every plan.
Open Volatility Surface in RingMasterThe Volatility Surface guide
Expiry Ladder
On 28 Sep 2026, BIIB has 10 captured expiries, from 2 Oct 2026 to 16 Apr 2027.
| Expiry | Days | At the money IV | Call open interest | Put open interest |
|---|---|---|---|---|
| 2 Oct 2026 | 4 | 46.4% | 1,354 | 535 |
| 9 Oct 2026 | 11 | 42.3% | 87 | 70 |
| 16 Oct 2026 | 18 | 39.0% | 2,685 | 1,216 |
| 23 Oct 2026 | 25 | 38.1% | 260 | 5 |
| 30 Oct 2026 | 32 | 45.5% | 70 | 35 |
| 20 Nov 2026 | 53 | 41.2% | 236 | 16 |
| 18 Dec 2026 | 81 | 41.8% | 4,051 | 2,312 |
| 15 Jan 2027 | 109 | 41.0% | 6,156 | 2,834 |
| 19 Mar 2027 | 172 | 41.4% | 892 | 702 |
| 16 Apr 2027 | 200 | 41.2% | 52 | 173 |
Open interest is summed over the strikes captured near the price on each expiry.
From the option chain at the close on 28 Sep 2026. Current on every plan.
Strike Table
On 28 Sep 2026, BIIB's largest open interest sits at the 200 strike, with 2,674 contracts across the captured expiries.
| Strike | Call open interest | Put open interest | Total |
|---|---|---|---|
| 200 | 1,336 | 1,338 | 2,674 |
| 250 | 2,659 | 4 | 2,663 |
| 230 | 2,280 | 71 | 2,351 |
| 210 | 1,241 | 864 | 2,105 |
| 180 | 597 | 1,097 | 1,694 |
| 240 | 1,445 | 25 | 1,470 |
From the option chain at the close on 28 Sep 2026. Current on every plan.
Since Yesterday
From 25 Sep 2026 to 28 Sep 2026, BIIB's at the money IV moved from 38.0 percent to 45.5 percent.
| Figure | 25 Sep | 28 Sep | Change |
|---|---|---|---|
| At the money IV | 38.0% | 45.5% | +7.6 points |
| Open interest, strikes captured near the price | 21,912 | 23,741 | +1,829 |
| Put/call ratio, open interest | 0.52 | 0.50 | -0.02 |
Open interest changes cannot identify buyers or sellers.
From the option chain at the close on 28 Sep 2026. Current on every plan.
Changed Hands
On 28 Sep 2026, 4,847 BIIB option contracts traded, 1.0 times its own recent average.
| Figure | Value |
|---|---|
| Calls traded | 2,805 |
| Puts traded | 2,042 |
| Against its recent average | 1.0 times |
| Busier than | 13 of its last 20 trading days |
| Open interest, whole chain | 31,856 contracts |
| Volume to open interest | 0.15 |
| Unusual volume flag | No |
Traded volume and open interest are shown side by side and never combined. Open interest changes cannot identify buyers or sellers.
From the option chain at the close on 28 Sep 2026. Current on every plan.
Positioning Replay
The replay holds 33 trading days of BIIB's option positioning, from 11 Aug 2026 to 28 Sep 2026.
| Date | Close | Net dollar gamma | Top call strike | Top put strike |
|---|---|---|---|---|
| 11 Aug 2026 | 203.89 | $2.35 million | 210 | 190 |
| 21 Sep 2026 | 219.07 | $2.95 million | 230 | 200 |
| 28 Sep 2026 | 228.69 | $4.6 million | 230 | 200 |
Each frame restates one nightly capture. Net is calls minus puts, a convention, not who holds the contracts.
From the option chain at the close on 28 Sep 2026. Current on every plan.
Open Positioning Replay in RingMasterThe Positioning Replay guide
Read-out
On 25 Sep 2026 the desk's view of BIIB was bearish, paper trading.
| Figure | Value |
|---|---|
| Side | Bearish at 45 trading days, no signal |
| Level above the close | 229.19, the swing high of 23 Sep 2026, a close past it runs against the view |
| Level below the close | 222.25, the swing low of 14 Sep 2026 |
| The chart | Sits against the view |
| Strategy family | Bear call spread (sell a call spread above the price) |
| Price target | None. The desk has no price model. |
The levels are prices the shares turned at on the chart, with the date of each.
Paper trading. The model's figures from 25 Sep 2026, one trading day behind, as the Free plan shows them.
Rank by Timeframe
On 25 Sep 2026 BIIB sat at the 19th percentile of the model's 45 trading day ranking, paper trading.
| Timeframe | Percentile | Side |
|---|---|---|
| 10 trading days | 44 of 100 | Neutral |
| 20 trading days | 4 of 100 | Bearish |
| 45 trading days | 19 of 100 | Bearish |
100 is the top of the ranking. A name in the middle three fifths is neutral.
Paper trading. The model's figures from 25 Sep 2026, one trading day behind, as the Free plan shows them.
Open Rank by Timeframe in RingMasterThe Rank by Timeframe guide
Timeframe Agreement
On 25 Sep 2026, 2 of 3 timeframes put BIIB on the bearish side, paper trading.
| Group | Timeframes | Side | On that side |
|---|---|---|---|
| Near | 10 day, 20 day | Bearish | 1 of 2 |
| Long | 45 day | Bearish | 1 of 1 |
Paper trading. The model's figures from 25 Sep 2026, one trading day behind, as the Free plan shows them.
Open Timeframe Agreement in RingMasterThe Timeframe Agreement guide
Signal History
On 25 Sep 2026 BIIB had carried no signal for at least 18 trading days, paper trading.
| Trading day | Signal | 45 day percentile |
|---|---|---|
| 25 Sep 2026 | None | 19 of 100 |
| 24 Sep 2026 | None | 16 of 100 |
| 23 Sep 2026 | None | 17 of 100 |
| 22 Sep 2026 | None | 38 of 100 |
| 21 Sep 2026 | None | 23 of 100 |
| 18 Sep 2026 | None | 20 of 100 |
| 17 Sep 2026 | None | 19 of 100 |
| 16 Sep 2026 | None | 32 of 100 |
Paper trading. The model's figures from 25 Sep 2026, one trading day behind, as the Free plan shows them.
Sector Split
On 25 Sep 2026, 32 of 120 Health Care names were bullish and 52 were bearish, paper trading.
| Sector | Names | Bullish | Bearish | Neutral |
|---|---|---|---|---|
| Health Care | 120 | 32 | 52 | 36 |
Paper trading. The model's figures from 25 Sep 2026, one trading day behind, as the Free plan shows them.
Price Chart
BIIB closed at 228.69 on 28 Sep 2026.
| Figure | Value |
|---|---|
| Last close | 228.69 |
| Change over 5 trading days | +4.4% |
| Change over 21 trading days | +3.2% |
| Change over 63 trading days | +5.6% |
| Change over 252 trading days | +68.6% |
| 52 week high | 230.49 |
| 52 week low | 135.39 |
| 20 day moving average | 219.76 |
| 50 day moving average | 213.41 |
| 200 day moving average | 194.21 |
| RSI, 14 days | 64 |
Worked out from the desk's own daily bars, adjusted for share splits.
From the daily bars through 28 Sep 2026. Current on every plan.
Earnings Radar
BIIB reports next on 28 Oct 2026, a date confirmed by the company.
| Figure | Value |
|---|---|
| Next report | 28 Oct 2026, before the open |
| Date | Confirmed by the company |
| Move after the report of 29 Jul 2026 | +1.8% |
| Move after the report of 29 Apr 2026 | +6.0% |
| Move after the report of 6 Feb 2026 | +8.5% |
| Move after the report of 30 Oct 2025 | +1.2% |
Earnings calendar as of 28 Sep 2026. Current on every plan.
Short Volume
On 25 Sep 2026, 75.7 percent of BIIB's reported volume at the covered venues was marked short.
| Figure | Value |
|---|---|
| Short sale share, 25 Sep | 75.7% |
| Five day average | 67.3% |
| 52 week median | 59.4% |
| Short interest, share of shares outstanding | 3.9% at the 15 Sep 2026 settlement |
| Days to cover | 7.6 |
Short sale volume counts trades marked short at the covered venues, mostly off exchange. It is not the same as short interest.
Short volume as of 25 Sep 2026. Current on every plan.
Seasonality
In the 34 Septembers on record, BIIB's average change was plus 2.3 percent, and it rose in 50.0 percent of them.
| Month | Average change | Middle change | Share of years up | Years |
|---|---|---|---|---|
| September | +2.3% | +0.3% | 50.0% | 34 |
| October | +6.1% | +4.2% | 55.9% | 34 |
| November | +1.8% | +3.4% | 60.0% | 35 |
Each figure is a month end to month end change in past years. A past month says nothing certain about the next one.
Monthly history through 28 Sep 2026. Current on every plan.
Headlines
The desk's news feeds carried 1 headline naming BIIB in the 3 days to 28 Sep 2026.
| Figure | Value |
|---|---|
| Headlines in the window | 1 |
| Latest | 28 Sep 2026 |
The titles are in the Headlines window, with the time each was published.
Headlines as of 28 Sep 2026. Current on every plan.
Questions
- What is BIIB's IV rank?
- BIIB's IV rank is 94 of 100 on 28 Sep 2026.
- What move are BIIB options pricing?
- On 28 Sep 2026, BIIB options priced a move of 13.2 percent down and 13.1 percent up by 30 Oct 2026.
- Where are BIIB's call wall and put wall?
- On 28 Sep 2026, BIIB's call wall is the 230 strike and its put wall is the 200 strike.
- What was the desk's latest view of BIIB on the Free plan?
- On 25 Sep 2026 the desk's view of BIIB was bearish, paper trading.
- When does BIIB report earnings next?
- BIIB reports next on 28 Oct 2026, a date confirmed by the company.
More Health Care names
- INSM, Insmed Incorporated
- CI, Cigna Group
- BNTX, BioNTech SE
- NTRA, Natera, Inc.
- TMO, Thermo Fisher Scientific
Guides and the full list
- Every covered stock, fund and index, A to Z
- Reading the options suite
- Options for beginners
- How Trade Cards work
- Words the desk uses
Membership gets tonight's signals the night they publish. Free gets every options screen, never delayed, and the signals one trading day behind.