BIIB
Underperforming without a clear catalyst yet
- BIIB −1.32% on the last session vs SPY +0.74%: −2.1 pts of stock-specific move.
- Market backdrop (Fri): Average Hourly Earnings m/m 0.1% vs 0.3% expected (cooler); Non-Farm Employment Change 29K vs 89K expected (weaker); S&P futures +0.41%, 10-year yield -5bp in the 30 minutes after.
After each kind of event
| Event | Events | 1 day | 1 week | 1 month | 1 quarter |
|---|---|---|---|---|---|
| Any day | 1,255 | -0.1%#495 H | 0.0%#461 H | -1.1%#495 H | -1.5%#420 M |
| Big drop (-2.3% or worse) | 64 | +0.1%#308 H | 0.0%#442 H | -1.2%#499 H | +0.9%#299 M |
| Big gain (+2.4% or better) | 75 | -0.2%#477 H | -1.0%#455 H | -1.2%#493 H | +2.1%#299 M |
| Earnings beat | 18 | +0.4%#218 M | -0.6%#442 M | +3.3%#81 M | +4.0%#182 M |
| Earnings miss | 2 | -0.2%– | -3.8%– | -3.3%– | +2.0%– |
| 52-week high | 9 | -0.6%#312 M | -0.7%#371 M | -2.5%#467 M | +3.0%#176 L |
| 52-week low | 9 | -0.5%#210 M | -0.9%#205 M | -6.1%#258 M | +0.9%#163 L |
| Crossed above 200-day avg | 4 | -2.1%#420 L | -3.2%#469 L | -1.9%#311 L | +8.8%#197 L |
| Crossed below 200-day avg | 4 | +0.8%#217 L | +0.3%#258 L | -1.9%#341 L | +11.5%#186 L |
| RSI oversold | 15 | +0.2%#209 M | +0.8%#197 M | -1.4%#473 M | -5.0%#474 M |
| RSI overbought | 9 | +0.2%#224 M | -2.4%#451 M | -1.5%#486 M | -3.8%#365 M |
| Reddit spike | — | — | — | — | — |
| Analyst upgrade | — | — | — | — | — |
| Analyst downgrade | — | — | — | — | — |
| Insider buy | — | — | — | — | — |
| Insider unplanned sale | — | — | — | — | — |
Median gain from the close of the session the event was known, over each holding period; #rank among the S&P 500 stocks after the same kind of event (#1 = best). "Big" is BIIB's own: its worst / best 10% of days over the prior 2 years. Highlighted: happening in the latest session.
52-week low
A new 52-week closing low.
| Holding | Events | Median (likely range) | Confidence | Rank | Up | vs SPY | Range of outcomes (worst · 25–75% · median · best) | vs S&P 500 stocks (their medians) |
|---|---|---|---|---|---|---|---|---|
| 1 day | 9 | -0.54% (-2.2 to +1.2) | Medium | #210 of 272 | 44% | -0.61% |
-3%
+2%
|
|
| 1 week | 9 | -0.89% (-4.3 to +0.8) | Medium | #205 of 270 | 33% | -2.10% |
-14%
+6%
|
|
| 1 month | 9 | -6.06% (-8.4 to -2.8) | Medium | #258 of 260 | 11% | -4.37% |
-13%
+3%
|
|
| 1 quarter | 9 ≈6 indep. | +0.88% (-17.1 to +4.0) | Low | #163 of 219 | 56% | -5.19% |
-21%
+7%
|
Range of outcomes: all of BIIB's new 52-week lows in the past 5 years, from the worst to the best result over each holding period; the box holds the middle half, the tick is the median. A wide box means the median alone says little. Hover the median for the average.
52-week low by trend
| When it happened | Events | 1 day | 1 week | 1 month | 1 quarter |
|---|---|---|---|---|---|
| Long trendAbove its 200-day avg now | — | — | — | — | — |
| Below its 200-day avg | 9 | -0.5%M vs -0.1% | -0.9%M vs -0.3% | -6.1%M vs -2.8% | +0.9%L vs -6.4% |
| Medium trendAbove its 50-day avg now | — | — | — | — | — |
| Below its 50-day avg | 9 | -0.5%M vs 0.0% | -0.9%M vs -0.1% | -6.1%M vs -1.9% | +0.9%L vs -3.4% |
| Short trendAbove its 20-day avg | — | — | — | — | — |
| Below its 20-day avg now | 9 | -0.5%M vs 0.0% | -0.9%M vs +0.1% | -6.1%M vs -1.9% | +0.9%L vs -4.6% |
The same event split by where BIIB stood against its 200-, 50- and 20-day averages when it happened (a dip in an uptrend vs a falling knife); "vs" is the plain any-day median in that trend; "now" marks where it stands today. Splitting halves the evidence, so watch the confidence letters: H / M / L.
Latest new 52-week lows
| Event | Entry | 1 day | 1 week | 1 month | 1 quarter | |
|---|---|---|---|---|---|---|
| Apr 1, 2025 | Apr 1 @ $132.03 | -3.5% on the day | -0.5% | -13.6% | -8.4% | +0.9% |
| Jan 17, 2025 | Jan 17 @ $140.55 | -0.5% on the day | +0.3% | +5.8% | -2.8% | -17.1% |
| Dec 12, 2024 | Dec 12 @ $155.33 | -1.4% on the day | -3.4% | -5.1% | -9.2% | -7.9% |
| Oct 25, 2024 | Oct 25 @ $181.69 | -1.2% on the day | +1.8% | -4.3% | -12.6% | -20.5% |
| Sep 25, 2024 | Sep 25 @ $189.07 | -2.6% on the day | +2.4% | -0.2% | -2.8% | -21.2% |
| Mar 25, 2024 | Mar 25 @ $216.69 | -0.7% on the day | -2.2% | -4.2% | -6.8% | +3.0% |
| Feb 14, 2024 | Feb 14 @ $220.74 | -2.6% on the day | +1.2% | +0.8% | -0.6% | +6.6% |
| Nov 8, 2023 | Nov 8 @ $231.69 | -5.7% on the day | -3.0% | -0.9% | +3.3% | +4.0% |
| Oct 2, 2023 | Oct 2 @ $252.86 | -1.6% on the day | -0.6% | +4.5% | -6.1% | +5.9% |
Aftermath: entry is the close of the first session the event was fully known (the same session for price moves, the reaction session for earnings, the next session for Reddit, analyst and insider events, which are dated by day). Repeats within a few sessions count as one event. Past performance after an event says nothing certain about the next one. Not advice.