The Gorman-Rupp Company Common Shares GRC 73.75 0.5 0.68%
GRC Historical Options Analysis
Explore GRC (The Gorman-Rupp Company Common Shares) historical options data, volatility, Greeks and positioning. Compare signals over time in the free Historical Lab preview.
Window
Scale
Plotted 3/8
Metric library
Volatility
Interactive timeline
GRC / Comparative study
3 signals / 508 sessions
Window statistics
Signal snapshot
Current value vs. selected history
IV Rank
z -0.61
4.48
Mean
14.76
Window
-85.9%
ATM IV
z -0.58
0.37
Mean
0.78
Window
-65.9%
IV Percentile
z -0.19
43.02
Mean
48.65
Window
-46.2%
Relationship matrix
Correlation
Pearson r
| Signal | IV Rank | ATM IV | IV Percent... |
|---|---|---|---|
| IV Rank | 1.00 | 0.90 | 0.74 |
| ATM IV | 0.90 | 1.00 | 0.71 |
| IV Percent... | 0.74 | 0.71 | 1.00 |
Source observations
Data inspector
1-50 of 508
- 1 / 11
| Date | Close | IV Rank | ATM IV | IV Percentile |
|---|---|---|---|---|
| 2026-09-21 | 73.75 | 4.48 | 0.37 | 43.02 |
| 2026-09-18 | 73.25 | 4.32 | 0.36 | 40.15 |
| 2026-09-17 | 72.1 | 7.19 | 0.47 | 76.06 |
| 2026-09-16 | 72.17 | 7.71 | 0.48 | 79.92 |
| 2026-09-15 | 71.23 | 7.78 | 0.49 | 79.92 |
| 2026-09-14 | 71.5 | 7.62 | 0.48 | 79.46 |
| 2026-09-11 | 74.47 | 3.79 | 0.34 | 20.85 |
| 2026-09-10 | 73.23 | 6.34 | 0.43 | 68.34 |
| 2026-09-09 | 74.77 | 7.19 | 0.47 | 74.52 |
| 2026-09-08 | 75.49 | 6.5 | 0.44 | 69.5 |
| 2026-09-07 | 75.34 | 6.36 | 0.43 | 68.6 |
| 2026-09-04 | 75.34 | 5.88 | 0.42 | 61.78 |
| 2026-09-03 | 75.1 | 4.46 | 0.37 | 41.7 |
| 2026-09-02 | 73.94 | 4.93 | 0.38 | 49.03 |
| 2026-09-01 | 73.99 | 7.19 | 0.47 | 72.87 |
| 2026-08-31 | 75.4 | 0.73 | 0.23 | 2.33 |
| 2026-08-28 | 76.22 | 2.6 | 0.3 | 8.53 |
| 2026-08-27 | 77.58 | 4.31 | 0.36 | 39.15 |
| 2026-08-26 | 77.62 | 4.42 | 0.36 | 40.7 |
| 2026-08-25 | 76.76 | 4.92 | 0.38 | 48.45 |
| 2026-08-24 | 77.82 | 7.61 | 0.48 | 75.1 |
| 2026-08-21 | 78.09 | 7.01 | 0.46 | 71.71 |
| 2026-08-20 | 77.85 | 4.5 | 0.37 | 43.02 |
| 2026-08-19 | 78.52 | 5.44 | 0.4 | 55.43 |
| 2026-08-18 | 78.75 | 5.44 | 0.4 | 55.81 |
| 2026-08-17 | 80.65 | 6.15 | 0.43 | 64.2 |
| 2026-08-14 | 80.81 | 3.13 | 0.32 | 15.5 |
| 2026-08-13 | 79.92 | 6.99 | 0.46 | 71.32 |
| 2026-08-12 | 81.5 | 6.92 | 0.46 | 70.93 |
| 2026-08-11 | 82.79 | 9.47 | 0.55 | 82.95 |
| 2026-08-10 | 81.79 | 6.73 | 0.45 | 70.43 |
| 2026-08-07 | 83.79 | 5.72 | 0.41 | 61.24 |
| 2026-08-06 | 84.58 | 5.18 | 0.39 | 54.65 |
| 2026-08-05 | 85.22 | 5.34 | 0.4 | 56.2 |
| 2026-08-04 | 85.48 | 4.85 | 0.38 | 50.39 |
| 2026-08-03 | 82.8 | 8.14 | 0.5 | 78.6 |
| 2026-07-31 | 81.19 | 5.48 | 0.4 | 58.14 |
| 2026-07-30 | 80.69 | 6.24 | 0.43 | 66.28 |
| 2026-07-29 | 78.47 | 5.22 | 0.39 | 55.81 |
| 2026-07-28 | 82.43 | 6.54 | 0.44 | 68.22 |
| 2026-07-27 | 80.56 | 6.5 | 0.44 | 68.09 |
| 2026-07-24 | 81.73 | 5.63 | 0.41 | 59.69 |
| 2026-07-23 | 79.62 | 8.55 | 0.52 | 77.13 |
| 2026-07-22 | 80.09 | 8.07 | 0.5 | 75.97 |
| 2026-07-21 | 80.3 | 6.66 | 0.45 | 67.44 |
| 2026-07-20 | 79.19 | 5.88 | 0.42 | 61.87 |
| 2026-07-17 | 79.74 | 4.28 | 0.42 | 63.95 |
| 2026-07-16 | 80.76 | 4.75 | 0.45 | 67.44 |
| 2026-07-15 | 79.19 | 4.89 | 0.46 | 67.83 |
| 2026-07-14 | 80.03 | 5.07 | 0.47 | 68.6 |