ISRG expected-move history Intuitive Surgical, Inc.
Every trading day after the close we record what the options market was pricing — per expiration, before the outcome was known. When an expiration passes, the outcome is written next to the original estimate. Estimates are never revised after the fact. How to read these statistics · recording since Aug 31, 2026
Comparisons resolved121
Close inside range39%
|Actual| under expected39%
Avg expected move±5.3%
Avg |actual| move7.2%
Mean abs. error3.2pt
Implied vs realized, by expiration
For each expiration: the amber outline is the expected move recorded closest to expiry; the solid bar is what the stock actually did. Signed values are printed beneath the bars.
expected (recorded)actual
Currently recorded (awaiting outcome)
| Snapshot | Expires | DTE | Spot then | Expected move | Range | Method |
|---|---|---|---|---|---|---|
| Oct 20 | Oct 23 | 3 | 406.75 | ±10.0% | 366.20–447.30 | em-1.0 |
| Oct 19 | Oct 23 | 4 | 433.18 | ±7.8% | 399.58–466.78 | em-1.0 |
| Oct 16 | Oct 23 | 7 | 426.70 | ±7.9% | 393.00–460.40 | em-1.0 |
| Oct 14 | Oct 23 | 9 | 420.24 | ±7.9% | 386.84–453.64 | em-1.0 |
| Oct 13 | Oct 23 | 10 | 422.06 | ±8.4% | 386.66–457.46 | em-1.0 |
| Oct 09 | Oct 23 | 14 | 424.00 | ±8.6% | 387.50–460.50 | em-1.0 |
| Oct 08 | Oct 23 | 15 | 415.31 | ±8.9% | 378.16–452.46 | em-1.0 |
| Oct 07 | Oct 23 | 16 | 414.54 | ±8.6% | 378.79–450.29 | em-1.0 |
| Oct 06 | Oct 23 | 17 | 406.00 | ±8.9% | 369.90–442.10 | em-1.0 |
| Oct 05 | Oct 23 | 18 | 406.69 | ±8.7% | 371.14–442.24 | em-1.0 |
| Oct 02 | Oct 23 | 21 | 391.95 | ±8.9% | 357.10–426.80 | em-1.0 |
| Oct 01 | Oct 23 | 22 | 404.90 | ±8.4% | 370.95–438.85 | em-1.0 |
| Sep 23 | Oct 23 | 30 | 401.03 | ±9.7% | 361.98–440.08 | em-1.0 |
| Sep 22 | Oct 23 | 31 | 401.03 | ±9.7% | 361.98–440.08 | em-1.0 |
| Sep 21 | Oct 23 | 32 | 403.09 | ±10.2% | 361.84–444.34 | em-1.0 |
| Sep 18 | Oct 23 | 35 | 392.76 | ±10.5% | 351.71–433.81 | em-1.0 |
| Sep 17 | Oct 23 | 36 | 383.54 | ±10.7% | 342.64–424.44 | em-1.0 |
| Sep 16 | Oct 23 | 37 | 385.10 | ±10.7% | 343.75–426.45 | em-1.0 |
| Sep 15 | Oct 23 | 38 | 377.16 | ±10.8% | 336.51–417.81 | em-1.0 |
| Sep 14 | Oct 23 | 39 | 378.35 | ±11.0% | 336.85–419.85 | em-1.0 |
| Sep 11 | Oct 23 | 42 | 369.15 | ±11.1% | 328.00–410.30 | em-1.0 |
| Sep 10 | Oct 23 | 43 | 359.88 | ±11.5% | 318.48–401.28 | em-1.0 |
| Sep 09 | Oct 23 | 44 | 353.51 | ±11.6% | 312.66–394.36 | em-1.0 |
| Sep 08 | Oct 23 | 45 | 350.90 | ±11.7% | 309.80–392.00 | em-1.0 |
| Sep 07 | Oct 23 | 46 | 366.25 | ±11.4% | 324.40–408.10 | em-1.0 |
| Sep 04 | Oct 23 | 49 | 365.92 | ±11.3% | 324.47–407.37 | em-1.0 |
| Sep 03 | Oct 23 | 50 | 371.36 | ±11.7% | 327.96–414.76 | em-1.0 |
| Oct 20 | Oct 30 | 10 | 406.75 | ±11.2% | 361.30–452.20 | em-1.0 |
| Oct 19 | Oct 30 | 11 | 433.18 | ±8.9% | 394.73–471.63 | em-1.0 |
| Oct 16 | Oct 30 | 14 | 426.70 | ±9.2% | 387.65–465.75 | em-1.0 |
Resolved snapshots
| Snapshot | Expired | Expected | Actual | Inside range? | Spot → close |
|---|---|---|---|---|---|
| Oct 16, 2026 | Oct 16 | ±1.1% | +0.0% | inside | 426.70 → 426.70 |
| Oct 14, 2026 | Oct 16 | ±2.3% | +1.5% | inside | 420.24 → 426.70 |
| Oct 13, 2026 | Oct 16 | ±2.7% | +1.1% | inside | 422.06 → 426.70 |
| Oct 09, 2026 | Oct 16 | ±3.3% | +0.6% | inside | 424.00 → 426.70 |
| Oct 08, 2026 | Oct 16 | ±3.9% | +2.7% | inside | 415.31 → 426.70 |
| Oct 07, 2026 | Oct 16 | ±3.9% | +2.9% | inside | 414.54 → 426.70 |
| Oct 06, 2026 | Oct 16 | ±4.3% | +5.1% | outside | 406.00 → 426.70 |
| Oct 05, 2026 | Oct 16 | ±4.2% | +4.9% | outside | 406.69 → 426.70 |
| Oct 02, 2026 | Oct 16 | ±4.7% | +8.9% | outside | 391.95 → 426.70 |
| Oct 01, 2026 | Oct 16 | ±4.5% | +5.4% | outside | 404.90 → 426.70 |
| Sep 23, 2026 | Oct 16 | ±7.6% | +6.4% | inside | 401.03 → 426.70 |
| Sep 22, 2026 | Oct 16 | ±7.6% | +6.4% | inside | 401.03 → 426.70 |
| Sep 21, 2026 | Oct 16 | ±7.3% | +5.9% | inside | 403.09 → 426.70 |
| Sep 18, 2026 | Oct 16 | ±7.7% | +8.6% | outside | 392.76 → 426.70 |
| Sep 17, 2026 | Oct 16 | ±8.7% | +11.3% | outside | 383.54 → 426.70 |
| Sep 16, 2026 | Oct 16 | ±8.1% | +10.8% | outside | 385.10 → 426.70 |
| Sep 15, 2026 | Oct 16 | ±8.5% | +13.1% | outside | 377.16 → 426.70 |
| Sep 14, 2026 | Oct 16 | ±8.4% | +12.8% | outside | 378.35 → 426.70 |
| Sep 11, 2026 | Oct 16 | ±8.3% | +15.6% | outside | 369.15 → 426.70 |
| Sep 10, 2026 | Oct 16 | ±9.0% | +18.6% | outside | 359.88 → 426.70 |
| Sep 09, 2026 | Oct 16 | ±9.0% | +20.7% | outside | 353.51 → 426.70 |
| Sep 08, 2026 | Oct 16 | ±9.4% | +21.6% | outside | 350.90 → 426.70 |
| Sep 07, 2026 | Oct 16 | ±8.9% | +16.5% | outside | 366.25 → 426.70 |
| Sep 04, 2026 | Oct 16 | ±8.9% | +16.6% | outside | 365.92 → 426.70 |
| Sep 03, 2026 | Oct 16 | ±9.2% | +14.9% | outside | 371.36 → 426.70 |
| Sep 02, 2026 | Oct 16 | ±9.4% | +12.5% | outside | 379.43 → 426.70 |
| Sep 01, 2026 | Oct 16 | ±9.2% | +15.5% | outside | 369.49 → 426.70 |
| Aug 31, 2026 | Oct 16 | ±9.8% | +13.1% | outside | 377.25 → 426.70 |
| Oct 09, 2026 | Oct 09 | ±0.7% | -0.0% | inside | 424.00 → 423.96 |
| Oct 08, 2026 | Oct 09 | ±2.0% | +2.1% | outside | 415.31 → 423.96 |
| Oct 07, 2026 | Oct 09 | ±2.3% | +2.3% | inside | 414.54 → 423.96 |
| Oct 06, 2026 | Oct 09 | ±2.8% | +4.4% | outside | 406.00 → 423.96 |
| Oct 05, 2026 | Oct 09 | ±3.1% | +4.2% | outside | 406.69 → 423.96 |
| Oct 02, 2026 | Oct 09 | ±3.4% | +8.2% | outside | 391.95 → 423.96 |
| Oct 01, 2026 | Oct 09 | ±3.7% | +4.7% | outside | 404.90 → 423.96 |
| Sep 23, 2026 | Oct 09 | ±5.9% | +5.7% | inside | 401.03 → 423.96 |
| Sep 22, 2026 | Oct 09 | ±5.9% | +5.7% | inside | 401.03 → 423.96 |
| Sep 21, 2026 | Oct 09 | ±5.8% | +5.2% | inside | 403.09 → 423.96 |
| Sep 18, 2026 | Oct 09 | ±6.2% | +7.9% | outside | 392.76 → 423.96 |
| Sep 17, 2026 | Oct 09 | ±6.4% | +10.5% | outside | 383.54 → 423.96 |
| Sep 16, 2026 | Oct 09 | ±6.8% | +10.1% | outside | 385.10 → 423.96 |
| Sep 15, 2026 | Oct 09 | ±7.1% | +12.4% | outside | 377.16 → 423.96 |
| Sep 14, 2026 | Oct 09 | ±6.5% | +12.1% | outside | 378.35 → 423.96 |
| Sep 11, 2026 | Oct 09 | ±7.3% | +14.8% | outside | 369.15 → 423.96 |
| Sep 10, 2026 | Oct 09 | ±7.7% | +17.8% | outside | 359.88 → 423.96 |
| Sep 09, 2026 | Oct 09 | ±7.6% | +19.9% | outside | 353.51 → 423.96 |
| Sep 08, 2026 | Oct 09 | ±8.0% | +20.8% | outside | 350.90 → 423.96 |
| Sep 07, 2026 | Oct 09 | ±7.7% | +15.8% | outside | 366.25 → 423.96 |
| Sep 04, 2026 | Oct 09 | ±7.6% | +15.9% | outside | 365.92 → 423.96 |
| Sep 03, 2026 | Oct 09 | ±7.9% | +14.2% | outside | 371.36 → 423.96 |
| Sep 02, 2026 | Oct 09 | ±8.3% | +11.7% | outside | 379.43 → 423.96 |
| Sep 01, 2026 | Oct 09 | ±8.1% | +14.7% | outside | 369.49 → 423.96 |
| Aug 31, 2026 | Oct 09 | ±8.5% | +12.4% | outside | 377.25 → 423.96 |
| Oct 02, 2026 | Oct 02 | ±1.3% | +0.0% | inside | 391.95 → 391.95 |
| Oct 01, 2026 | Oct 02 | ±2.0% | -3.2% | outside | 404.90 → 391.95 |
| Sep 23, 2026 | Oct 02 | ±4.4% | -2.3% | inside | 401.03 → 391.95 |
| Sep 22, 2026 | Oct 02 | ±4.4% | -2.3% | inside | 401.03 → 391.95 |
| Sep 21, 2026 | Oct 02 | ±4.4% | -2.8% | inside | 403.09 → 391.95 |
| Sep 18, 2026 | Oct 02 | ±4.9% | -0.2% | inside | 392.76 → 391.95 |
| Sep 17, 2026 | Oct 02 | ±5.1% | +2.2% | inside | 383.54 → 391.95 |
Outcomes compare the recorded range with the closing price on expiration day. Method version shown per row where it differs; current: em-1.0.