BIIB

Biogen Inc.

NASDAQ · Common stock

232.65

−2.70 (−1.15%)

Close, Oct 16, 2026

Watch

Structural summary

What is the structure, what changed, and what would invalidate it

Viridia Intelligence

Context across dimensions, not a rating

StructureHigher highs, higher lowsIntermediate-degree swings on the daily chart.

WaveConstructiveFlat complete, next move up (Pattern Confidence 67); the weekly count agrees.

FibonacciZone aboveNearest confluence 242.38–245.38 (3 relationships), +4.8% from the close.

MomentumStrong3 months +16.4% (ahead of SPY by 13.5 points); 6 months +31.2%.

RegimeUptrend+5.9% vs the 50-day average, +17.6% vs the 200-day.

RiskNormal20-day volatility 23% vs 33% over the year; 1-year drawdown −14.3%; beta 0.32.

BIIB setup history4 resolved: 1 reached target first

Current structure

Price, swings and the preferred count on the chart

BIIB · 1DLoading bars…

SourceMassive, end of dayUpdated—MethodDaily bars, split-adjusted

Candidate interpretations

Every count shown passes every hard rule

Candidate interpretations

Ranked by Pattern Confidence

Counts ending at the latest intermediate swing low, 186.03 on Jul 15, 2026. 148 labelings tested, 112 broke a hard rule, 12+ remain.

Hard-rule evidence: why 112 labelings were eliminated

51Wave 2 always retraces less than 100% of wave 1
11Contracting triangle: C ends short of A's end, D short of B's end, and E short of C's end
11Expanding triangle: C ends beyond A's end, D beyond B's end, and E beyond C's end
10Expanding diagonal: wave 3 is longer than wave 1, wave 5 longer than wave 3, and wave 4 longer than wave 2
9Wave 4 does not enter the price territory of wave 1
9Price after the last labeled point has not crossed a rule-based invalidation level

Method Every chain of 3–6 alternating pivots ending at the latest confirmed pivot is tested as each pattern; only counts with zero hard-rule failures are kept, then ranked by Pattern Confidence. Rules: rulebook.Engine pivots-1.0.0+rules-1.0.0+candidates-1.0.0+fib-1.0.1+rank-1.1.0+setup-1.0.1, bars to Oct 16, 2026

Fibonacci map

Confluence zones above and below the closeClose 232.65

232.65close

Bar length is the zone's strength (a weighted count of relationships, not a probability). Select a zone to see what forms it.

242.38 – 245.38+4.8% from the close

3 relationships · strength 3.6 · Intermediate, Minor degrees

245.38ProjectionWave C = 100% of wave A · Intermediate · Essentials
243.21ProjectionWave 5 = 61.8% of waves 1–3 · Minor · Essentials
242.38ProjectionWave C = 123.6% of wave A · Minor · EWF · secondary ratio

Method Targets come from the Fibonacci relationships the sources describe for the wave in progress, Elliott trend channels, the prior fourth wave of lesser degree, and 38.2–78.6% retracements of the latest swing. A zone is where two or more independent relationships fall within max(¼ ATR, 0.4%) of each other; strength counts them, weighting primary ratios and higher degrees. It is not a probability.

Evidence

The setup the preferred count implies, and how that kind of setup has done

Setup

Intermediate degree · from the preferred count

No scenario at intermediate degree right now

The count has no unreached Fibonacci target beyond the current price. Viridia shows nothing rather than a guess.

NoteResearch scenario generated from Viridia's structural model. Not a recommendation.MethodA setup restates the preferred count as a trade: the entry (the close, or the level where the correction in progress most often ends), the stop where the count is wrong (a rule level, or the end of a finished pattern), and the count's own Fibonacci target. Reward:risk is measured from the middle of the entry range. A setup needs reward:risk of at least 1 : 1. It is research output from the wave count, not a recommendation or a forecast.

Engine details

Analysis engine: pivots-1.0.0+rules-1.0.0+candidates-1.0.0+fib-1.0.1+rank-1.1.0+setup-1.0.1
Bars analysed to: Oct 16, 2026
Price history: Automatic, updated nightly
Daily bars: 514 since Sep 30, 2024
Avg volume, 50 days: 978.6K
Dollar volume, 20 days: $283.5M
SEC CIK: 0000875045
Provider symbols: nasdaqtrader: BIIB · massive: BIIB
Listing changes: None since Sep 24, 2026

SourcePrices: Massive (end of day, split-adjusted). Listings: Nasdaq Trader, SECUpdatedOct 19, 2026, 8:00 AM EDTMethodSecurity master, daily snapshot diff

Structure at a glance

Daily chart, as of Oct 16, 2026

Since the count's last pivot (186.03, Jul 15, 2026) price has moved +25.1%, the way the count expects.12 of 12 rule-valid counts expect the current move to be up.Weekly count: flat wave C ↑, same direction

Preferred count

Flat down · complete, next move up ↑

A three-wave flat correction down looks complete, so the larger trend would normally resume up.

A-B-C from 202.41, Feb 6, 2026

Pattern Confidence67Medium

4 of 5 checks met

Key levels, preferred count

Reassess−20.0% from close

186.03

The pattern ended here. A move below it means its last wave is still going, so the pattern isn't complete.

Target, next move

None

No unreached Fibonacci target.

Nearest confluence zone+4.8% from close

242.38–245.38

3 Fibonacci relationships meet here.

Alternate count

Zigzag up · wave C ↑

Price is in wave C of a three-wave zigzag correction up.

A-B from 135.39, Sep 29, 2025

Pattern Confidence57Low

2 of 3 checks met

Why this count is preferred · 4 met, 1 not met

Met

Wave C ends slightly beyond wave A (regular), substantially beyond (expanded), or short of it after an extended B (running)
Wave C measures 61.8% to 161.8% of wave A, depending on the flat type
Alternate waves are related by a Fibonacci ratio within 5% (wave 5 to wave 1, C to A, or triangle legs at 61.8%), the more reliable kind of relationship
The count starts at the price extreme of the prior swing (a new trend begins where the old one ended)

Not met

The flat is a regular or expanded flat; running flats are a rare variation

MethodPattern Confidence = (guidelines met + 2) ÷ (guidelines measured + 4), from the rulebook's guidelines, Fibonacci tendencies and wave-personality checks (wave 3 speed and volume, wave 5 volume, alternation in time, a start at the prior extreme), alternate waves in Fibonacci ratio, and the rarity of running flats. The alternate is the best-ranked count that tells a different story. It ranks the rule-valid counts against each other; it is not a probability of any outcome.

Structural summary

Viridia Intelligence

Current structure

Candidate interpretations

Candidate interpretations

Fibonacci map

Fibonacci map

Evidence

Setup

Engine details

Structure at a glance

What changed