BSX
Underperforming without a clear catalyst yet
- BSX −1.46% on the last session vs SPY +0.74%: −2.2 pts of stock-specific move.
- Aftermath, 52-week low (Oct 2): After its 5 new 52-week lows in the past 5 years, BSX typically gained 1.1% over the next day (median) and was higher 60% of the time; half the outcomes fell between -0.6% and +1.1%. An ordinary day: +0.1%. Among S&P 500 stocks after new 52-week lows, that ranks #46 of 272. (Low confidence: few independent periods.)
- 1 insider or congressional trade in the past 30 days.
- 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%#266 H | +0.3%#233 H | +1.1%#186 H | +3.5%#175 M |
| Big drop (-2.0% or worse) | 63 | -0.3%#490 H | -0.1%#451 H | +0.1%#361 H | +0.5%#312 M |
| Big gain (+1.6% or better) | 68 | +0.1%#257 H | -1.4%#494 H | -0.4%#402 H | +1.4%#351 M |
| Earnings beat | 17 | 0.0%#252 M | -0.9%#354 M | +1.4%#230 M | +2.2%#290 M |
| Earnings miss | 2 | +0.3%– | +0.2%– | +3.1%– | +10.3%– |
| 52-week high | 21 | 0.0%#450 H | -0.7%#476 H | +1.1%#140 H | +5.6%#67 M |
| 52-week low latest session | 6 | +1.1%#46 L | -2.3%#209 L | -9.6%#260 L | -27.6%– |
| Crossed above 200-day avg | 5 | -0.3%#314 L | +0.6%#207 L | -1.5%#348 L | +8.9%#139 L |
| Crossed below 200-day avg | 5 | -0.7%#367 L | -0.4%#299 L | -1.8%#465 L | +1.7%#272 L |
| RSI oversold | 14 | +0.6%#67 M | +1.4%#157 M | -3.4%#435 M | -5.9%#345 L |
| RSI overbought | 16 | -0.4%#478 M | +0.3%#132 M | +1.1%#80 M | +4.1%#66 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 BSX's own: its worst / best 10% of days over the prior 2 years. Highlighted: happening in the latest session.
RSI oversold
The 14-day RSI falls below 30.
| 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 | 14 | +0.65% (-0.3 to +1.2) | Medium | #67 of 496 | 57% | +0.78% |
-2%
+4%
|
|
| 1 week | 14 | +1.38% (-1.3 to +3.0) | Medium | #157 of 496 | 57% | -0.29% |
-5%
+6%
|
|
| 1 month | 14 ≈11 indep. | -3.39% (-9.2 to -0.5) | Medium | #435 of 495 | 36% | -2.21% |
-13%
+16%
|
|
| 1 quarter | 14 ≈7 indep. | -5.91% (-25.8 to -0.5) | Low | #345 of 493 | 29% | -9.63% |
-32%
+19%
|
Range of outcomes: all of BSX's oversold readings 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.
RSI oversold by trend
| When it happened | Events | 1 day | 1 week | 1 month | 1 quarter |
|---|---|---|---|---|---|
| Long trendAbove its 200-day avg | 1 | +2.1%– vs +0.1% | +4.4%– vs +0.6% | +16.1%– vs +2.2% | +14.2%– vs +7.6% |
| Below its 200-day avg now | 11 | -0.3%M vs 0.0% | +1.0%M vs -0.2% | -6.8%M vs -3.9% | -23.4%L vs -11.4% |
| Medium trendAbove its 50-day avg | — | — | — | — | — |
| Below its 50-day avg now | 13 | +0.4%M vs +0.1% | +1.8%M vs +0.4% | -5.5%M vs +1.3% | -6.9%L vs -1.3% |
| Short trendAbove its 20-day avg | — | — | — | — | — |
| Below its 20-day avg now | 14 | +0.6%M vs +0.1% | +1.4%M vs +0.4% | -3.4%M vs +0.9% | -5.9%L vs +1.4% |
The same event split by where BSX 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 oversold readings
| Event | Entry | 1 day | 1 week | 1 month | 1 quarter | |
|---|---|---|---|---|---|---|
| Jun 24, 2026 | Jun 24 @ $44.46 | RSI 29.7, -2.5% on the day | -0.6% | -3.1% | -0.5% | +0.4% |
| May 28, 2026 | May 28 @ $49.11 | RSI 29.8, -2.7% on the day | -1.6% | -0.5% | -11.5% | -5.0% |
| May 11, 2026 | May 11 @ $53.37 | RSI 29.4, -1.0% on the day | +1.4% | +4.8% | -9.4% | -4.1% |
| Mar 30, 2026 | Mar 30 @ $62.93 | RSI 25.7, -9.0% on the day | -0.3% | -1.7% | -9.2% | -32.2% |
| Mar 10, 2026 | Mar 10 @ $69.96 | RSI 29.9, -2.7% on the day | -0.5% | +1.8% | -12.4% | -30.0% |
| Feb 20, 2026 | Feb 20 @ $74.58 | RSI 28.4, -1.5% on the day | -0.3% | +3.0% | -6.8% | -23.4% |
| Feb 4, 2026 | Feb 4 @ $75.50 | RSI 19.6, -17.6% on the day | +2.8% | -2.7% | -5.5% | -25.8% |
| Jan 16, 2026 | Jan 16 @ $88.07 | RSI 26.7, -2.2% on the day | +3.6% | +6.2% | -13.4% | -30.7% |
| Dec 11, 2025 | Dec 11 @ $91.75 | RSI 29.7, -1.0% on the day | +0.9% | +4.8% | +2.6% | -23.9% |
| Oct 1, 2025 | Oct 1 @ $95.85 | RSI 27.8, -1.8% on the day | +0.4% | +1.0% | +4.9% | -0.5% |
| Sep 16, 2025 | Sep 16 @ $98.98 | RSI 29.5, -0.9% on the day | -0.5% | -1.3% | -1.3% | -6.9% |
| Apr 4, 2025 | Apr 4 @ $89.70 | RSI 28.4, -8.9% on the day | +2.1% | +4.4% | +16.1% | +14.2% |
| Jun 14, 2022 | Jun 14 @ $35.24 | RSI 26.6, -3.2% on the day | +2.2% | +5.1% | +6.6% | +19.4% |
| Nov 23, 2021 | Nov 23 @ $40.23 | RSI 29.0, -1.1% on the day | +1.2% | -5.2% | +6.2% | +9.2% |
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.