Biogen (BIIB) Anomalies

Check historical price trends and seasonality for Biogen (BIIB).

View:

Biogen (BIIB) average YTD return over the past 10 years is -3.85%.

Over the past 10 years, the return for the specified period (Apr 17 for 60 days) is +3.21%.

5 wins 2 losses with a win rate of 71.43%.

AI Analysis (Past 10 Years YTD)

Biogen (BIIB) Anomaly Analysis

1) Overview:

Biogen's historical seasonality reveals a generally bearish trend throughout the year. The most significant downward pressure occurs in March, culminating in a substantial average loss of -10.7% by March 23. The stock experiences a slight bullish phase around January 14, with an average gain of +1.5%. The year typically ends with a decline, averaging -3.9% by December 31.

2) Buy-the-dip points:

The most pronounced dip opportunity appears in late March, specifically around March 23, where the stock has historically shown a significant average decline of -10.7%. This period of weakness could present a strategic entry point for investors anticipating a rebound. Another potential, though less dramatic, buying opportunity may arise near the end of December, around December 31, where the stock tends to decline by an average of -3.9%.

3) Summary:

Seasonality suggests a cautious approach to Biogen, with potential entry points during periods of historical weakness. Consider initiating positions around March 23 to capitalize on the significant average decline, or near December 31 for a smaller pullback. Investors should be aware of the overall bearish tendency and manage risk accordingly.

Disclaimer: This analysis is generated by AI (Gemini) based on historical statistical trends. It does not guarantee future performance. Investment decisions are your own responsibility.
YearStart DateStart PriceEnd DateEnd PriceReturnRate (%)
2025 2025-04-17 118.6100 2025-06-15 130.6500 12.0400 10.15
2024 2024-04-17 192.1600 2024-06-15 231.6900 39.5300 20.57
2023 2023-04-17 292.2000 2023-06-15 297.8300 5.6300 1.93
2020 2020-04-17 342.5500 2020-06-15 278.4900 -64.0600 -18.70
2019 2019-04-17 227.1800 2019-06-15 227.6700 0.4900 0.22
2018 2018-04-17 264.7500 2018-06-15 305.0300 40.2800 15.21
2017 2017-04-17 274.0500 2017-06-15 255.0200 -19.0300 -6.94
Avg 244.5000 246.6257 2.13 3.21
365 Days (Prev Close Change) Average (Past 10 Years) [Horz=Month / Vert=Day]
Negative Zero/Flat Positive ※ Change from prev day close. Excl Feb 29.
Mode:
Day \ Month Jan Total +0.15% Feb Total -3.15% Mar Total -3.14% Apr Total -0.98% May Total +1.06% Jun Total +1.63% Jul Total +3.67% Aug Total +1.18% Sep Total +2.39% Oct Total -1.58% Nov Total +3.10% Dec Total -1.76%
1 Avg +0.19% 0.00% +0.11% +0.39% -1.31% +0.19% +0.20% +0.86% +0.86% +0.08% +0.69% +0.75% -0.49%
2 Avg +0.06% +0.69% -1.48% +0.54% -0.23% +0.02% +0.36% +0.35% +0.90% +0.75% -0.85% -0.54% +0.17%
3 Avg -0.04% +0.43% -0.65% -0.22% -0.38% +0.21% +0.69% -0.14% -0.05% -0.35% +0.19% +0.40% -0.59%
4 Avg +0.39% -0.29% +0.82% -0.11% -0.10% -0.08% +0.81% 0.00% +0.03% -0.23% -0.08% +4.26% -0.32%
5 Avg +0.04% +0.10% +1.09% -0.16% -0.04% -0.32% +0.32% +0.23% -0.55% -0.09% +0.49% -0.24% -0.30%
6 Avg +0.19% +0.27% +0.27% -0.11% +0.61% -0.34% -0.21% +2.18% +0.10% -0.38% -0.30% +0.07% +0.08%
7 Avg +0.18% -0.32% -1.00% -0.16% -1.00% -0.10% +2.76% -0.15% +1.20% +0.24% +0.02% +0.76% -0.07%
8 Avg -0.01% -0.41% -0.67% -0.53% +0.04% +0.04% +0.27% +1.32% +0.42% -0.18% -0.36% -0.75% +0.66%
9 Avg -0.34% +0.22% +0.49% -1.12% +0.77% +0.13% -0.14% -0.36% -0.38% -0.40% +0.22% -2.64% -0.85%
10 Avg -0.02% +0.36% +0.23% -0.29% -0.54% +0.26% +0.01% +0.23% -0.74% -0.08% -0.26% +0.40% +0.17%
11 Avg -0.14% +0.23% -0.75% +0.02% -0.37% +0.20% -0.89% -0.21% -0.18% +0.54% -0.45% +0.29% -0.08%
12 Avg -0.20% -0.42% -0.15% -1.45% -0.33% +0.12% +0.30% -0.35% +0.09% -0.06% -0.18% -0.34% +0.35%
13 Avg +0.28% -0.04% +0.09% +1.77% +0.80% +0.40% -0.58% +0.02% +0.56% -0.70% +0.74% +0.10% +0.17%
14 Avg -0.07% +0.73% -0.79% -0.37% +0.51% -0.03% -0.51% +0.27% -0.30% +0.15% -0.03% +0.04% -0.47%
15 Avg -0.04% -0.54% +0.55% -0.04% -0.46% +0.73% -0.26% -0.89% +0.30% +0.10% -0.61% +0.54% +0.10%
16 Avg -0.12% -0.38% -0.50% -0.76% -0.13% +0.09% -0.25% +0.04% +0.20% +0.28% +0.29% -0.24% -0.06%
17 Avg +0.13% +0.25% +0.29% +1.01% +0.48% -0.24% -0.24% +0.26% -0.31% -0.02% +0.45% -0.32% +0.02%
18 Avg -0.47% -0.39% -0.25% -0.10% +0.12% -0.30% -1.22% -0.36% -0.61% -0.36% -0.86% -0.28% -0.98%
19 Avg -0.02% -0.50% +0.31% -0.70% +0.48% -0.20% +0.90% +0.20% +0.20% +0.32% -1.27% -0.12% +0.09%
20 Avg +0.01% -0.15% -0.18% -0.26% -0.40% +0.88% +0.39% -0.56% -0.23% +0.10% +0.10% +0.01% +0.43%
21 Avg -0.30% -0.42% -0.42% -2.83% -0.04% -0.74% +0.49% +0.92% +0.28% -0.46% -0.07% +0.50% -0.76%
22 Avg +0.15% +0.53% +0.59% -0.35% -1.32% -0.04% -0.33% +0.44% -0.37% +0.04% +2.35% +0.43% -0.18%
23 Avg -0.24% +0.04% -0.29% -1.12% -0.24% -0.63% -0.05% +0.50% -0.40% -0.32% -0.59% -0.30% +0.50%
24 Avg -0.08% -0.25% -0.55% +0.55% +0.73% +0.39% -1.07% +0.35% -0.24% -0.44% -0.34% -0.10% -0.02%
25 Avg +0.07% +0.15% +0.38% +0.46% +0.78% -0.05% -0.07% -0.10% -0.18% -0.59% -0.41% +0.46% 0.00%
26 Avg +0.03% +0.19% -0.25% +1.70% +0.27% -0.35% -0.35% -1.13% -0.34% +0.26% -0.04% -0.36% +0.74%
27 Avg -0.03% +0.44% -0.34% -0.44% +0.23% +0.50% -0.31% +0.24% -0.19% +0.16% -0.98% +0.32% -0.02%
28 Avg +0.28% -0.27% -0.06% +0.09% +0.46% -0.12% -0.48% -0.21% +0.22% +3.97% +0.10% -0.10% -0.28%
29 Avg +0.20% +0.75% - +0.41% -0.11% +0.37% +0.70% -0.18% +0.10% -0.41% +0.04% -0.27% +0.77%
30 Avg +0.08% -0.65% - +0.51% -0.26% +0.14% +0.39% -0.46% +0.41% +0.48% +0.90% +0.39% -1.03%
31 Avg +0.15% -0.19% - +0.52% - -0.08% - +0.36% +0.40% - -0.46% - +0.48%

Past 10 Years 1-Month [Apr 17 - May 16] Return Ranking

Rank Stock Avg Return (%) Wins Losses