BIIB
Timing
Best timing BIIB, to hold for
The best times to own BIIB (Biogen Inc.) in the past two years - buying and selling right before market close. The gain is ranked against owning other SP500 component stocks over the same term. For example, Rank #188 in one week means that 187 of the SP500 stocks did better on their best one week performance over the past year. Updated 2026-08-13T21:16:27.631981+00:00.
| Ownership Term | Buy Date (@Close) | Sell Date (@Close) | Gain | Rank against SP500s |
|---|---|---|---|---|
| One Single Day | Tue 2025/09/30 | Wed 2025/10/01 | +10.09% | #158 |
| One Week | Fri 2025/09/26 | Fri 2025/10/03 | +16.39% | #188 |
| One Month | Tue 2025/10/28 | Fri 2025/11/28 | +22.10% | #242 |
| 3 Months | Thu 2025/08/28 | Fri 2025/11/28 | +37.27% | #182 |
| 6 Months | Wed 2025/08/06 | Fri 2026/02/06 | +55.54% | #141 |
| One Year | Mon 2025/06/30 | Tue 2026/06/30 | +72.04% | #147 |
Comparing now with the best starting days
| Daily status (@Close) | 1d gain | 1w gain | 1m gain | 3m gain | 6m gain | 1y gain |
|---|---|---|---|---|---|---|
| Thu 2026/08/13 (Today) | +0.85% | +2.12% | +0.78% | +2.99% | +7.19% | +55.82% |
| Tue 2025/09/30 (Best One Single Day) | +1.13% | +0.55% | +5.94% | +11.54% | +1.24% | -27.73% |
| Fri 2025/09/26 (Best One Week) | +1.25% | -3.60% | +0.48% | +8.23% | -3.55% | -29.04% |
| Tue 2025/10/28 (Best One Month) | -0.86% | +1.99% | +8.56% | +15.35% | +25.19% | -19.39% |
| Thu 2025/08/28 (Best 3 Months) | -2.72% | -4.65% | +2.61% | +4.01% | -5.59% | -35.04% |
| Wed 2025/08/06 (Best 6 Months) | -2.67% | +2.13% | -2.66% | +10.72% | -9.15% | -35.37% |
| Mon 2025/06/30 (Best One Year) | -0.39% | +0.67% | -3.24% | -9.24% | -16.38% | -45.82% |