ISRG
Reddit attention is surging
- ISRG −2.32% on the last session vs SPY +0.74%: −3.1 pts of stock-specific move.
- Aftermath, big drop (Oct 2): After its 63 big drops in the past 5 years, ISRG typically gained 1.3% over the next week (median) and was higher 60% of the time; half the outcomes fell between -2.0% and +3.8%. An ordinary week: +0.1%. Among S&P 500 stocks after big drops, that ranks #47 of 500.
- 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%#157 H | +0.1%#348 H | 0.0%#388 H | +0.1%#324 M |
| Big drop latest session (-2.2% or worse) | 64 | +0.3%#92 H | +1.3%#47 H | +0.7%#334 H | +4.7%#227 M |
| Big gain Sep 28 (+2.1% or better) | 56 | +0.4%#67 H | +0.8%#115 H | +2.0%#165 H | +5.1%#205 M |
| Earnings beat | 18 | +0.9%#19 M | -1.6%#439 M | +5.1%#52 M | -0.6%#337 M |
| Earnings miss | 2 | +3.1%– | +5.8%– | -1.0%– | +10.5%– |
| 52-week high | 12 | -0.2%#470 M | -0.1%#334 M | +1.2%#180 M | +9.6%#42 L |
| 52-week low | 6 | +1.3%#35 L | +3.7%#9 L | +5.2%#103 L | +28.7%#39 L |
| Crossed above 200-day avg | 8 | +0.3%#161 M | +1.7%#129 M | +5.8%#118 M | +2.6%#252 L |
| Crossed below 200-day avg | 7 | -0.7%#387 L | 0.0%#320 L | -1.1%#280 L | +7.9%#92 L |
| RSI oversold | 11 | +1.3%#34 M | +1.2%#152 M | -1.9%#440 M | +1.7%#312 M |
| RSI overbought | 17 | +0.2%#96 M | -0.8%#480 M | +4.0%#24 M | +5.3%#83 M |
| Reddit spike | 3 | +4.1%#19 L | +2.0%#24 L | +4.8%#22 L | -0.6%#72 L |
| 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 ISRG's own: its worst / best 10% of days over the prior 2 years. Highlighted: happening in the latest session.
Reddit spike
Daily Reddit mentions at least 3x the prior week's average (20 or more); entry the next session.
| 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 | 3 | +4.14% (-1.8 to +4.6) | Low | #19 of 92 | 67% | +2.04% |
-2%
+5%
|
|
| 1 week | 3 | +2.00% (-2.1 to +5.7) | Low | #24 of 92 | 67% | -0.93% |
-2%
+6%
|
|
| 1 month | 3 | +4.78% (-1.8 to +11.2) | Low | #22 of 91 | 67% | +2.32% |
-2%
+11%
|
|
| 1 quarter | 3 | -0.58% (-11.9 to +0.1) | Low | #72 of 87 | 33% | -4.09% |
-12%
0%
|
Range of outcomes: all of ISRG's Reddit spikes 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.
Reddit spike by trend
| When it happened | Events | 1 day | 1 week | 1 month | 1 quarter |
|---|---|---|---|---|---|
| Long trendAbove its 200-day avg | 2 | +1.4%– vs +0.1% | 0.0%– vs +0.3% | +1.5%– vs +1.4% | -6.2%– vs +4.2% |
| Below its 200-day avg now | 1 | +4.1%– vs +0.1% | +5.7%– vs -0.1% | +11.2%– vs -1.5% | +0.1%– vs +6.3% |
| Medium trendAbove its 50-day avg now | 2 | +1.4%– vs +0.1% | 0.0%– vs +0.4% | +1.5%– vs +1.4% | -6.2%– vs +0.7% |
| Below its 50-day avg | 1 | +4.1%– vs 0.0% | +5.7%– vs -0.4% | +11.2%– vs -1.4% | +0.1%– vs +2.1% |
| Short trendAbove its 20-day avg now | 3 | +4.1%L vs 0.0% | +2.0%L vs +0.2% | +4.8%L vs +1.1% | -0.6%L vs -0.2% |
| Below its 20-day avg | — | — | — | — | — |
The same event split by where ISRG 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 Reddit spikes
| Event | Entry | 1 day | 1 week | 1 month | 1 quarter | |
|---|---|---|---|---|---|---|
| Oct 21, 2025 | Oct 22 @ $527.03 | 25 mentions vs 0.7/day the week before | +4.6% | +2.0% | +4.8% | -0.6% |
| Apr 22, 2025 | Apr 23 @ $487.93 | 20 mentions vs 0.1/day the week before | +4.1% | +5.7% | +11.2% | +0.1% |
| Jan 23, 2025 | Jan 24 @ $584.05 | 24 mentions vs 1.0/day the week before | -1.8% | -2.1% | -1.8% | -11.9% |
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.