GRC (The Gorman-Rupp Company Common Shares)
Historical IV Rank & Volatility Regime
IV Rank measures where GRC's current 30-day implied volatility sits in its trailing 90-day distribution (0% = lowest in 90 days, 100% = highest). It's the most reliable signal for whether options on GRC are priced rich or cheap relative to its own recent regime.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
GRC IV Rank Summary
Current
11%
Compressed — premium buying regime
30-Day Avg
12%
60-Day Avg
21%
90-Day Avg
18%
90-Day Low
3%
90-Day High
81%
IV Rank is bounded 0%–100% by construction. Sustained levels above 75% historically
precede mean reversion in GRC's implied vol; sustained sub-25% readings
often coincide with low-realized regimes ahead of catalyst events. See the
Vol Arb Screener for symbols where current IV
rank diverges most from realized volatility.
GRC IV Rank — Last 90 Trading Days
| Date | IV Rank | Avg IV |
|---|---|---|
| 20260723 | 11% | 0.6% |
| 20260722 | 12% | 0.6% |
| 20260721 | 9% | 0.5% |
| 20260720 | 8% | 0.5% |
| 20260716 | 6% | 0.5% |
| 20260715 | 7% | 0.5% |
| 20260714 | 6% | 0.5% |
| 20260713 | 6% | 0.5% |
| 20260710 | 5% | 0.5% |
| 20260709 | 5% | 0.5% |
| 20260708 | 5% | 0.5% |
| 20260707 | 5% | 0.5% |
| 20260706 | 4% | 0.5% |
| 20260702 | 28% | 0.8% |
| 20260701 | 25% | 0.8% |
| 20260630 | 29% | 0.8% |
| 20260629 | 28% | 0.8% |
| 20260626 | 16% | 0.6% |
| 20260625 | 14% | 0.6% |
| 20260624 | 18% | 0.7% |
| 20260623 | 19% | 0.7% |
| 20260622 | 20% | 0.7% |
| 20260618 | 12% | 0.6% |
| 20260617 | 13% | 0.6% |
| 20260616 | 11% | 0.6% |
| 20260615 | 12% | 0.6% |
| 20260613 | 7% | 0.5% |
| 20260612 | 8% | 0.5% |
| 20260611 | 10% | 0.6% |
| 20260610 | 9% | 0.5% |
| 20260609 | 5% | 0.5% |
| 20260608 | 6% | 0.5% |
| 20260605 | 6% | 0.5% |
| 20260604 | 7% | 0.5% |
| 20260603 | 7% | 0.5% |
| 20260602 | 81% | 1.5% |
| 20260601 | 65% | 1.3% |
| 20260529 | 69% | 1.3% |
| 20260528 | 62% | 1.2% |
| 20260527 | 60% | 1.2% |
| 20260526 | 44% | 1.0% |
| 20260510 | 35% | 0.9% |
| 20260508 | 34% | 0.8% |
| 20260507 | 38% | 0.9% |
| 20260506 | 40% | 0.9% |
| 20260505 | 34% | 0.8% |
| 20260504 | 38% | 0.9% |
| 20260502 | 22% | 0.7% |
| 20260501 | 20% | 0.7% |
| 20260430 | 7% | 0.5% |
| 20260429 | 32% | 0.8% |
| 20260428 | 35% | 0.9% |
| 20260427 | 7% | 0.5% |
| 20260424 | 14% | 0.6% |
| 20260423 | 28% | 0.8% |
| 20260422 | 24% | 0.7% |
| 20260421 | 5% | 0.4% |
| 20260420 | 19% | 0.6% |
| 20260417 | 24% | 0.7% |
| 20260416 | 21% | 0.7% |
| 20260415 | 22% | 0.7% |
| 20260414 | 24% | 0.7% |
| 20260413 | 17% | 0.6% |
| 20260410 | 17% | 0.6% |
| 20260409 | 17% | 0.6% |
| 20260408 | 13% | 0.6% |
| 20260407 | 6% | 0.5% |
| 20260406 | 6% | 0.5% |
| 20260402 | 11% | 0.5% |
| 20260401 | 27% | 0.8% |
| 20260331 | 22% | 0.7% |
| 20260330 | 23% | 0.7% |
| 20260327 | 15% | 0.6% |
| 20260326 | 17% | 0.6% |
| 20260325 | 12% | 0.5% |
| 20260324 | 15% | 0.6% |
| 20260323 | 11% | 0.5% |
| 20260320 | 6% | 0.5% |
| 20260319 | 3% | 0.4% |
| 20260318 | 10% | 0.5% |
| 20260317 | 10% | 0.5% |
| 20260316 | 9% | 0.5% |
| 20260313 | 8% | 0.5% |
| 20260312 | 10% | 0.5% |
| 20260311 | 6% | 0.5% |
| 20260310 | 9% | 0.5% |
| 20260309 | 6% | 0.5% |
| 20260308 | 11% | 0.5% |
| 20260306 | 11% | 0.5% |
| 20260305 | 5% | 0.4% |