BIIB · Expected Move
Biogen Inc. Common Stock
The expected move for BIIB is derived from at-the-money straddle pricing — the market's implied one-standard-deviation move through the next 30 days. Comparing it to realized moves reveals when options are pricing in too much (premium-selling regime) vs too little (premium-buying regime).
BIIB straddle price & implied vol
60 sessionsBars: at-the-money straddle price (30-day and 7-day) — the market's priced move. Line: 30-day at-the-money implied volatility (right axis).
Current BIIB Expected Move
30-Day Straddle
$25.90
7-Day Straddle
$18.15
30-Day ATM IV
43.7%
IV Rank
82%
Implied one-standard-deviation move through the next 30 days. Compare to BIIB's realized
move over the same window to gauge whether options are pricing in too much (premium-selling regime)
or too little (premium-buying regime). The
Expected Move Tracker ranks every symbol by
this measure.
BIIB Straddle Price — Last 60 Days
| Date | 30D Straddle | 7D Straddle | ATM IV | IV Rank |
|---|---|---|---|---|
| 20261027 | $25.90 | $18.15 | 43.7% | 82% |
| 20261026 | $27.30 | $17.30 | 46.3% | 98% |
| 20261023 | $25.90 | $18.20 | 46.0% | 97% |
| 20261022 | $25.15 | $16.25 | 43.5% | 81% |
| 20261021 | $24.30 | $15.65 | 43.4% | 82% |
| 20261020 | $23.90 | $16.20 | 42.2% | 74% |
| 20261019 | $22.45 | $7.60 | 41.0% | 67% |
| 20261016 | $21.20 | $9.80 | 40.8% | 66% |
| 20261015 | $21.60 | $10.45 | 40.7% | 65% |
| 20261014 | $22.50 | $10.80 | 41.8% | 71% |
| 20261013 | $20.95 | $11.35 | 39.2% | 56% |
| 20261012 | $21.40 | $7.67 | 39.9% | 60% |
| 20261009 | $18.55 | $7.90 | 37.7% | 47% |
| 20261008 | $19.45 | $8.57 | 39.1% | 56% |
| 20261007 | $19.75 | $9.32 | 38.6% | 53% |
| 20261006 | $19.50 | $8.95 | 37.4% | 46% |
| 20261005 | $19.65 | $6.10 | 37.2% | 44% |
| 20261002 | $17.55 | $6.40 | 36.5% | 40% |
| 20261001 | $18.90 | $8.20 | 36.8% | 42% |
| 20260930 | $19.85 | $9.62 | 38.2% | 50% |
| 20260929 | $20.35 | $9.70 | 37.4% | 45% |
| 20260928 | $20.85 | $6.78 | 36.8% | 42% |
| 20260925 | $15.65 | $8.03 | 32.9% | 19% |
| 20260924 | $15.70 | $7.88 | 31.8% | 12% |
| 20260923 | $16.25 | $8.90 | 30.8% | 6% |
| 20260922 | $16.60 | $8.50 | 31.7% | 11% |
| 20260921 | $16.55 | $7.10 | 31.9% | 12% |
| 20260918 | $14.90 | $7.20 | 30.9% | 6% |
| 20260917 | $15.75 | $7.60 | 31.9% | 12% |
| 20260916 | $16.80 | $7.97 | 32.6% | 16% |
| 20260915 | $15.90 | $8.85 | 31.5% | 10% |
| 20260914 | $17.60 | $6.72 | 33.3% | 21% |
| 20260911 | $15.95 | $7.70 | 33.0% | 19% |
| 20260910 | $16.15 | $8.62 | 33.3% | 21% |
| 20260909 | $15.70 | $9.28 | 32.5% | 16% |
| 20260908 | $16.40 | $9.95 | 32.8% | 18% |
| 20260904 | $15.60 | $5.57 | 31.7% | 11% |
| 20260903 | $15.65 | $6.55 | 31.0% | 7% |
| 20260902 | $16.70 | $9.55 | 32.3% | 15% |
| 20260901 | $15.80 | $9.12 | 31.4% | 9% |
| 20260831 | $16.40 | $5.85 | 31.6% | 11% |
| 20260828 | $14.80 | $6.90 | 30.3% | 3% |
| 20260827 | $15.95 | $8.43 | 31.1% | 7% |
| 20260826 | $16.05 | $9.93 | 31.3% | 9% |
| 20260825 | $16.15 | $8.90 | 31.0% | 7% |
| 20260824 | $16.10 | $6.28 | 31.2% | 8% |
| 20260821 | $15.15 | $8.00 | 31.3% | 9% |
| 20260820 | $16.55 | $9.25 | 32.8% | 18% |
| 20260819 | $16.15 | $8.52 | 31.4% | 9% |
| 20260818 | $15.70 | $9.85 | 31.3% | 9% |
| 20260817 | $16.15 | $5.35 | 32.3% | 15% |
| 20260814 | $14.60 | $7.12 | 31.6% | 11% |
| 20260813 | $14.80 | $7.83 | 31.2% | 8% |
| 20260812 | $15.55 | $7.05 | 32.2% | 14% |
| 20260811 | $15.35 | $9.05 | 32.1% | 14% |
| 20260810 | $16.35 | $6.53 | 32.9% | 18% |
| 20260807 | — | — | 32.6% | 17% |
| 20260806 | $17.00 | $9.85 | 36.0% | 37% |
| 20260805 | $16.95 | $8.25 | 35.5% | 34% |
| 20260804 | $18.20 | $10.68 | 37.3% | 45% |
More on BIIB
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.