BIIB monthly stock returns with historical performance by month, return charts, and downloadable statistics.
| Period | Return % |
|---|---|
| 2000-01 | 35.33 |
| 2000-02 | 5.98 |
| 2000-03 | -33.08 |
| 2000-04 | -32.03 |
| 2000-05 | -11.52 |
| 2000-06 | 56.15 |
| 2000-07 | 3.2 |
| 2000-08 | 8.43 |
| 2000-09 | 16.18 |
| 2000-10 | 24.94 |
| 2000-11 | -15.56 |
| 2000-12 | 5.9 |
| 2001-01 | -0.74 |
| 2001-02 | -1.19 |
| 2001-03 | -26.67 |
| 2001-04 | 27.16 |
| 2001-05 | 29.66 |
| 2001-06 | 3.52 |
In the last 67 months, BIIB increased in 27 and decreased in 39. The average return for this period was -0.18%, while the median return was -1.59%. Maximum gain was +33.64% on 2022-09 and maximum loss was -16.33% on 2021-09.
Total : 67 Months
In the last 67 months, BIIB increased in 27 and decreased in 39. The average return for this period was -0.18%, while the median return was -1.59%. Maximum gain was +33.64% on 2022-09 and maximum loss was -16.33% on 2021-09.
In the last 12 months, BIIB increased in 5 and decreased in 7. The average return for this period was +0.35%, while the median return was -1.15%. Maximum gain was +20.24% on 2025-11 and maximum loss was -8.29% on 2025-04.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | +16.3% | -2% | +2.4% | -4.1% | -2.8% | +29.6% | -6.4% | +2.2% | -16.3% | -6.1% | -13.4% | +4.5% |
| 2022 | -7.4% | -8% | +0.1% | -1.5% | -3.5% | +2% | +2.1% | -6.6% | +33.6% | +7.2% | +9% | -8.3% |
| 2023 | +6.7% | -7.5% | +2.1% | +9.7% | -4.7% | -5.8% | -5.3% | -0.7% | -3.8% | -6.1% | -2.3% | +10.3% |
| 2024 | -7.9% | -12.4% | -2.4% | 0% | +4.1% | +0.9% | -8% | -2.8% | -5.4% | -8.8% | -7.6% | -6.9% |
| 2025 | -4% | -1.3% | -3.4% | -8.3% | +7.3% | -4.2% | -1.6% | +0.2% | +0.3% | 0% | +20.2% | -1% |
| 2026 | +1.2% | +7.1% | -2.5% | +3% | +4.8% | +12.4% | -0.3% | — | — | — | — | — |
| 3Y Avg | -3.6% | -2.2% | -2.8% | -1.8% | +5.4% | +3% | -3.3% | -1.3% | -2.5% | -4.4% | +6.3% | -3.9% |
| 2026-07 | 209.7 | 209.0 | -0.3% |
| 2026-06 | 192.2 | 216.1 | +12.4% |
| 2026-05 | 187.1 | 196.0 | +4.8% |
| 2026-04 | 183.8 | 189.3 | +3.0% |
| 2026-03 | 188.1 | 183.3 | -2.5% |
| 2026-02 | 179.1 | 191.8 | +7.1% |
| 2026-01 | 177.8 | 179.9 | +1.2% |
| 2025-12 | 177.8 | 176.0 | -1.0% |
| 2025-11 | 151.4 | 182.1 | +20.2% |
| 2025-10 | 154.2 | 154.3 | +0.0% |
| 2025-09 | 139.6 | 140.1 | +0.3% |
| 2025-08 | 132.0 | 132.2 | +0.2% |
| 2025-07 | 130.1 | 128.0 | -1.6% |
| 2025-06 | 131.1 | 125.6 | -4.2% |
| 2025-05 | 120.9 | 129.8 | +7.3% |
| 2025-04 | 132.0 | 121.1 | -8.3% |
| 2025-03 | 141.7 | 136.8 | -3.4% |
| 2025-02 | 142.3 | 140.5 | -1.3% |
| 2025-01 | 150.0 | 143.9 | -4.1% |
| 2024-12 | 164.2 | 152.9 | -6.9% |
| 2024-11 | 173.8 | 160.6 | -7.6% |
| 2024-10 | 190.8 | 174.0 | -8.8% |
| 2024-09 | 204.8 | 193.8 | -5.4% |
| 2024-08 | 210.7 | 204.8 | -2.8% |
| 2024-07 | 231.8 | 213.2 | -8.0% |
| 2024-06 | 229.8 | 231.8 | +0.9% |
| 2024-05 | 216.1 | 224.9 | +4.1% |
| 2024-04 | 214.8 | 214.8 | 0.0% |
| 2024-03 | 221.0 | 215.6 | -2.4% |
| 2024-02 | 247.8 | 217.0 | -12.4% |
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | +16.3% | -2% | +2.4% | -4.1% | -2.8% | +29.6% | -6.4% | +2.2% | -16.3% | -6.1% | -13.4% | +4.5% |
| 2022 | -7.4% | -8% | +0.1% | -1.5% | -3.5% | +2% | +2.1% | -6.6% | +33.6% | +7.2% | +9% | -8.3% |
| 2023 | +6.7% | -7.5% | +2.1% | +9.7% | -4.7% | -5.8% | -5.3% | -0.7% | -3.8% | -6.1% | -2.3% | +10.3% |
| 2024 | -7.9% | -12.4% | -2.4% | 0% | +4.1% | +0.9% | -8% | -2.8% | -5.4% | -8.8% | -7.6% | -6.9% |
| 2025 | -4% | -1.3% | -3.4% | -8.3% | +7.3% | -4.2% | -1.6% | +0.2% | +0.3% | 0% | +20.2% | -1% |
| 2026 | +1.2% | +7.1% | -2.5% | +3% | +4.8% | +12.4% | -0.3% | — | — | — | — | — |
| 3Y Avg | -3.6% | -2.2% | -2.8% | -1.8% | +5.4% | +3% | -3.3% | -1.3% | -2.5% | -4.4% | +6.3% | -3.9% |
| 2001-07 | -17.9 |
| 2001-08 | 16.1 |
| 2001-09 | -16.37 |
| 2001-10 | 16.24 |
| 2001-11 | 14.87 |
| 2001-12 | -0.48 |
| 2002-01 | -12.75 |
| 2002-02 | 6.58 |
| 2002-03 | -1.44 |
| 2002-04 | -16.17 |
| 2002-05 | -20.94 |
| 2002-06 | -10.84 |
| 2002-07 | 36.78 |
| 2002-08 | -5.84 |
| 2002-09 | 6.49 |
| 2002-10 | 10.47 |
| 2002-11 | -29.55 |
| 2002-12 | -0.84 |
| 2003-01 | -6.58 |
| 2003-02 | -11.29 |
| 2003-03 | 17.59 |
| 2003-04 | -3.96 |
| 2003-05 | 15.61 |
| 2003-06 | -11.95 |
| 2003-07 | -4.42 |
| 2003-08 | 4.42 |
| 2003-09 | -4.56 |
| 2003-10 | 4.33 |
| 2003-11 | 8.47 |
| 2003-12 | -6.47 |
| 2004-01 | 16.35 |
| 2004-02 | 25.23 |
| 2004-03 | -0.91 |
| 2004-04 | 4.42 |
| 2004-05 | 4.44 |
| 2004-06 | 0.64 |
| 2004-07 | -3.01 |
| 2004-08 | 1.7 |
| 2004-09 | 1.95 |
| 2004-10 | -7.49 |
| 2004-11 | 1.79 |
| 2004-12 | 9.99 |
| 2005-01 | -2.01 |
| 2005-02 | -40.28 |
| 2005-03 | -16.36 |
| 2005-04 | 4.32 |
| 2005-05 | 4.77 |
| 2005-06 | -13.38 |
| 2005-07 | 15.29 |
| 2005-08 | 4.26 |
| 2005-09 | -7.76 |
| 2005-10 | 1.78 |
| 2005-11 | 6.25 |
| 2005-12 | 4.28 |
| 2006-01 | -4.26 |
| 2006-02 | 4.37 |
| 2006-03 | 0.32 |
| 2006-04 | -3.22 |
| 2006-05 | 2.64 |
| 2006-06 | -3.74 |
| 2006-07 | -10.59 |
| 2006-08 | 7.73 |
| 2006-09 | 0.97 |
| 2006-10 | 7.59 |
| 2006-11 | 9.4 |
| 2006-12 | -5.69 |
| 2007-01 | -2.01 |
| 2007-02 | -8.5 |
| 2007-03 | -0.43 |
| 2007-04 | 6.54 |
| 2007-05 | 8.79 |
| 2007-06 | 2.31 |
| 2007-07 | 5.07 |
| 2007-08 | 14.72 |
| 2007-09 | 4.37 |
| 2007-10 | 9.57 |
| 2007-11 | 1.72 |
| 2007-12 | -22.89 |
| 2008-01 | 9.09 |
| 2008-02 | -5.51 |
| 2008-03 | 4.84 |
| 2008-04 | -5.19 |
| 2008-05 | 0.67 |
| 2008-06 | -8.99 |
| 2008-07 | 17.56 |
| 2008-08 | 1.84 |
| 2008-09 | -0.1 |
| 2008-10 | -14.2 |
| 2008-11 | -8.64 |
| 2008-12 | 22.07 |
| 2009-01 | 0.33 |
| 2009-02 | -8.12 |
| 2009-03 | 19.14 |
| 2009-04 | -6.82 |
| 2009-05 | 11.95 |
| 2009-06 | -11.3 |
| 2009-07 | 1.67 |
| 2009-08 | 3.8 |
| 2009-09 | 2.6 |
| 2009-10 | -14.61 |
| 2009-11 | 10.21 |
| 2009-12 | 11.83 |
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| 2026-07-13 | 199.33 | 210.87 | 197.74 | 209.03 | — |
| 2026-07-10 | 197.63 | 199.98 | 194.37 | 199.15 | — |
| 2026-07-09 | 198.92 | 201 | 196 | 198.91 | — |
| 2026-07-08 | 204.86 | 206.75 | 198.93 | 200.36 | — |
| 2026-07-07 | 211.86 | 212 | 205.65 | 205.7 | — |
| 2026-07-06 | 215.95 | 215.95 | 208.27 | 208.46 | — |
| 2026-07-02 | 212.53 | 219 | 210.75 | 216.12 | — |
| 2026-07-01 | 215.25 | 215.76 | 209.67 | 209.74 | — |
| 2026-06-30 | 218 | 218 | 212.58 | 216.06 | — |
| 2026-06-29 | 215.01 | 219.72 | 214.08 | 216.63 | — |
| 2026-06-26 | 202.99 | 218.06 | 202.29 | 216.03 | — |
| 2026-06-25 | 201.63 | 206.66 | 200.2 | 201.96 | — |
| 2026-06-24 | 199.34 | 202.06 | 198.66 | 199.59 | — |
| 2026-06-23 | 198.87 | 201.22 | 197.01 | 197.19 | — |
| 2026-06-22 | 199.48 | 200.98 | 194.74 | 199.71 | — |
| 2026-06-18 | 200.22 | 200.99 | 193.2 | 196.58 | — |
| 2026-06-17 | 195.14 | 201.75 | 194.04 | 198.67 | — |
| 2026-06-16 | 199.69 | 200.26 | 194.04 | 195.61 | — |
| 2026-06-15 | 199.09 | 199.37 | 195.89 | 198.64 | — |
| 2026-06-12 | 201.29 | 203.45 | 199.06 | 200.05 | — |
| 2026-06-11 | 195.49 | 201.18 | 194.24 | 199.96 | — |
| 2026-06-10 | 200.12 | 201.94 | 194.1 | 194.24 | — |
| 2026-06-09 | 195.51 | 199.63 | 193.48 | 199.1 | — |
| 2026-06-05 | 196.45 | 200.66 | 195.14 | 195.34 | — |
| 2026-06-04 | 198 | 199.9 | 196.35 | 196.45 | — |
| 2026-06-03 | 187.69 | 196.36 | 187.48 | 195.96 | — |
| 2026-06-02 | 190 | 190.58 | 184.96 | 188.83 | — |
| 2026-06-01 | 194.5 | 195.28 | 191.67 | 192.23 | — |
| 2026-05-29 | 195.55 | 198.46 | 195.18 | 196 | — |
| 2026-05-28 | 196.97 | 198 | 194.5 | 196.39 | — |
| 2026-05-27 | 194.11 | 199.72 | 194.11 | 196.97 | — |
| 2026-05-22 | 190.53 | 194.75 | 190.01 | 193.76 | — |
| 2026-05-21 | 187.4 | 190.27 | 185.85 | 189.47 | — |
| 2026-05-20 | 191.41 | 193.38 | 186.37 | 187.8 | — |
| 2026-05-19 | 191.65 | 193.03 | 188.64 | 190.56 | — |
| 2026-05-18 | 191.25 | 193.37 | 189.19 | 191.91 | — |
| 2026-05-15 | 191.83 | 194.88 | 190.72 | 192.95 | — |
| 2026-05-14 | 200.25 | 205 | 189.49 | 191.37 | — |
| 2026-05-13 | 199.33 | 205.97 | 198.9 | 204.53 | — |
| 2026-05-12 | 198.45 | 202.4 | 196.47 | 199.36 | — |
| 2026-05-11 | 194.76 | 200.31 | 194.75 | 197.95 | — |
| 2026-05-08 | 189.68 | 195.2 | 189.5 | 193.45 | — |
| 2026-05-07 | 190.34 | 192.1 | 188.86 | 191.38 | — |
| 2026-05-06 | 189.13 | 191.16 | 188.3 | 190.68 | — |
| 2026-05-05 | 187.38 | 189.69 | 186 | 189.13 | — |
| 2026-05-04 | 186.28 | 187.51 | 185.44 | 187.21 | — |
| 2026-05-01 | 189.28 | 190.57 | 186.17 | 187.06 | — |
| 2026-04-30 | 194.04 | 195.98 | 187.16 | 189.28 | — |
| 2026-04-29 | 183.12 | 195.89 | 180.18 | 194.38 | — |
| 2026-04-28 | 182.45 | 184.41 | 181.89 | 183.38 | — |
| 2026-04-27 | 183.16 | 186.15 | 179.15 | 180.67 | — |
| 2026-04-24 | 186.65 | 186.65 | 183.17 | 184.38 | — |
| 2026-04-23 | 189.46 | 190.32 | 187.01 | 187.88 | — |
| 2026-04-22 | 188.81 | 192.75 | 188.71 | 190.07 | — |
| 2026-04-21 | 184.52 | 187.74 | 181.75 | 185.95 | — |
| 2026-04-20 | 179.54 | 184.26 | 178.94 | 183.34 | — |
| 2026-04-17 | 176.29 | 178.4 | 175.69 | 177.35 | — |
| 2026-04-16 | 178.68 | 179.5 | 174.85 | 176.02 | — |
| 2026-04-15 | 179.36 | 180.87 | 177.7 | 180.54 | — |
| 2026-04-14 | 177.71 | 181.77 | 177.45 | 178.96 | — |
| 2026-04-13 | 172.62 | 176.79 | 171.22 | 176.37 | — |
| 2026-04-10 | 177.97 | 177.97 | 172.32 | 172.97 | — |
| 2026-04-09 | 177.81 | 180.06 | 174.96 | 177.11 | — |
| 2026-04-08 | 178.24 | 180.17 | 176.35 | 179.9 | — |
| 2026-04-07 | 172.21 | 175.61 | 170.43 | 175.61 | — |
| 2026-04-06 | 177 | 177 | 168.64 | 172.34 | — |
| 2026-04-02 | 181.46 | 182.23 | 176.39 | 177.34 | — |
| 2026-04-01 | 183.17 | 186.31 | 181.71 | 183.78 | — |
| 2026-03-31 | 179.46 | 184.68 | 171.37 | 183.33 | — |
| 2026-03-30 | 186.16 | 190.09 | 185.55 | 187.57 | — |
| 2026-03-27 | 191.06 | 191.06 | 183.01 | 183.84 | — |
| 2026-03-26 | 189 | 192.27 | 188.35 | 191.06 | — |
| 2026-03-25 | 184.91 | 189.38 | 184.91 | 189.18 | — |
| 2026-03-24 | 182.63 | 184.84 | 180.33 | 183.94 | — |
| 2026-03-23 | 183.48 | 185 | 183.02 | 183.64 | — |
| 2026-03-20 | 183.13 | 183.69 | 180.48 | 181.46 | — |
| 2026-03-19 | 182.18 | 185.45 | 181.68 | 183.41 | — |
| 2026-03-18 | 184.13 | 184.32 | 180.48 | 182.31 | — |
| 2026-03-17 | 184.73 | 186.52 | 183.2 | 185.29 | — |
| 2026-03-16 | 182.76 | 184.62 | 181.88 | 183.26 | — |
| 2026-03-13 | 185.99 | 188 | 181.46 | 181.55 | — |
| 2026-03-12 | 187.86 | 188.91 | 184.63 | 184.9 | — |
| 2026-03-11 | 187.54 | 192.99 | 187.54 | 190.48 | — |
| 2026-03-10 | 187.69 | 190.78 | 187.02 | 188.41 | — |
| 2026-03-09 | 183.91 | 188.5 | 182.6 | 188.24 | — |
| 2026-03-06 | 186.25 | 186.25 | 181.24 | 184.87 | — |
| 2026-03-05 | 187.97 | 190.99 | 185.95 | 188.08 | — |
| 2026-03-04 | 185.06 | 190.37 | 183.16 | 189.94 | — |
| 2026-03-03 | 185.01 | 187.05 | 181.79 | 184.02 | — |
| 2026-03-02 | 190.22 | 190.75 | 186.72 | 188.05 | — |
| 2026-02-27 | 187.51 | 192.46 | 186.62 | 191.82 | — |
| 2026-02-26 | 190.3 | 190.74 | 185.9 | 188.02 | — |
| 2026-02-25 | 194.23 | 196.73 | 189.89 | 190.73 | — |
| 2026-02-25 | 194.23 | 196.73 | 189.89 | 190.73 | — |
| 2026-02-25 | 194.23 | 196.73 | 189.89 | 190.73 | — |
| 2026-02-24 | 196.03 | 198.72 | 194.43 | 195.13 | — |
| 2026-02-23 | 191.82 | 197.05 | 189.11 | 196.34 | — |
| 2026-02-20 | 190.78 | 192.6 | 189.95 | 192.03 | — |
| 2026-02-19 | 193.51 | 195 | 191.05 | 192.08 | — |
| 2026-02-18 | 195.32 | 195.68 | 193.11 | 194.13 | — |
| 2026-02-17 | 197.46 | 200.29 | 193.37 | 195.62 | — |
| 2026-02-13 | 196.27 | 199.5 | 195.52 | 196.52 | — |
| 2026-02-12 | 190.15 | 196 | 189 | 195.5 | — |
| 2026-02-11 | 188.35 | 192 | 187.2 | 191.2 | — |
| 2026-02-10 | 194.07 | 195.72 | 188.74 | 188.99 | — |
| 2026-02-09 | 199.83 | 201 | 191.88 | 193.81 | — |
| 2026-02-06 | 187.01 | 202.41 | 184.6 | 201.18 | — |
| 2026-02-05 | 184.87 | 187.73 | 184.54 | 185.36 | — |
| 2026-02-04 | 177.25 | 186.24 | 177.1 | 185.45 | — |
| 2026-02-03 | 177.79 | 182.67 | 176.19 | 176.76 | — |
| 2026-02-02 | 179.3 | 180.76 | 177.58 | 179.09 | — |
| 2026-01-30 | 177.09 | 180.14 | 175.96 | 179.89 | — |
| 2026-01-29 | 174.88 | 177.2 | 173.51 | 176.18 | — |
| 2026-01-28 | 173.63 | 175.06 | 170.85 | 174.83 | — |
| 2026-01-27 | 173.02 | 176.14 | 172.23 | 174.12 | — |
| 2026-01-26 | 171.67 | 174.31 | 170.59 | 173.12 | — |
| 2026-01-23 | 173.17 | 173.9 | 170.04 | 171.59 | — |
| 2026-01-22 | 171.78 | 175.29 | 171.65 | 173.8 | — |
| 2026-01-21 | 165.31 | 172.87 | 165.31 | 172.62 | — |
| 2026-01-20 | 161.51 | 165.61 | 160.36 | 165.38 | — |