Options Chain for COSTAR GROUP INC COM (CSGP) - $32.01 as of 10/27/2026 8:46:53 PM EST
Calls
| Strike | Bid | Ask | Premium | Last Price | Change | %Chg | Premium to Strike Price Ratio | Volume | Open Interest | IV | Delta | Gamma | Theta | Last Trade | Last Updated |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 17.50 | 13.50 | 17.00 | 15.25 | % | 0.87 | 0 | 0 | 2.48 | 1.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 20.00 | 11.10 | 14.50 | 12.80 | % | 0.64 | 0 | 0 | 2.06 | 1.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 22.50 | 8.70 | 10.70 | 9.70 | 10.35 | 0.00 | 0.00% | 0.43 | 0 | 2 | 1.63 | 1.00 | 0.01 | 0.00 | 10/20/2026 | 10/27/2026 3:59:55 PM EST |
| 25.00 | 6.50 | 8.20 | 7.35 | 8.10 | 0.00 | 0.00% | 0.29 | 0 | 8 | 1.25 | 0.95 | 0.03 | -0.01 | 10/21/2026 | 10/27/2026 3:59:55 PM EST |
| 30.00 | 2.65 | 3.50 | 3.08 | 4.50 | 0.00 | 0.00% | 0.10 | 0 | 449 | 0.64 | 0.68 | 0.07 | -0.03 | 10/26/2026 | 10/27/2026 3:59:55 PM EST |
| 35.00 | 0.90 | 1.05 | 0.98 | 0.95 | -0.65 | -40.63% | 0.03 | 66 | 422 | 0.65 | 0.30 | 0.07 | -0.03 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 40.00 | 0.25 | 0.50 | 0.38 | 0.30 | -0.18 | -37.50% | 0.01 | 11 | 327 | 0.73 | 0.08 | 0.03 | -0.02 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 45.00 | 0.00 | 0.35 | 0.18 | 0.15 | 0.00 | 0.00% | 0.00 | 0 | 79 | 0.96 | 0.02 | 0.01 | 0.00 | 10/26/2026 | 10/27/2026 3:59:55 PM EST |
Puts
| Strike | Bid | Ask | Premium | Last Price | Change | %Chg | Premium to Strike Price Ratio | Volume | Open Interest | IV | Delta | Gamma | Theta | Last Trade | Last Updated |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 17.50 | 0.00 | 0.50 | 0.25 | % | 0.01 | 0 | 0 | 1.82 | 0.00 | 0.00 | 0.00 | 10/27/2026 3:59:55 PM EST | |||
| 20.00 | 0.00 | 0.05 | 0.03 | 0.03 | 0.00 | 0.00% | 0.00 | 0 | 3 | 0.92 | 0.00 | 0.00 | 0.00 | 10/15/2026 | 10/27/2026 3:59:55 PM EST |
| 22.50 | 0.05 | 0.10 | 0.08 | 0.07 | +0.02 | +40.00% | 0.00 | 63 | 158 | 0.76 | 0.00 | 0.01 | 0.00 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 25.00 | 0.15 | 0.25 | 0.20 | 0.23 | +0.13 | +130.00% | 0.01 | 548 | 580 | 0.69 | -0.05 | 0.03 | -0.01 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 30.00 | 1.05 | 1.20 | 1.13 | 1.15 | +0.20 | +21.06% | 0.04 | 657 | 238 | 0.60 | -0.32 | 0.07 | -0.03 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 35.00 | 3.50 | 4.50 | 4.00 | 3.70 | +0.61 | +19.75% | 0.11 | 37 | 215 | 0.58 | -0.70 | 0.07 | -0.03 | 10/27/2026 | 10/27/2026 3:59:55 PM EST |
| 40.00 | 7.50 | 9.00 | 8.25 | 8.73 | 0.00 | 0.00% | 0.21 | 0 | 1 | 1.00 | -0.92 | 0.03 | -0.02 | 10/19/2026 | 10/27/2026 3:59:55 PM EST |
| 45.00 | 11.90 | 14.00 | 12.95 | 13.00 | 0.00 | 0.00% | 0.29 | 0 | 2 | 1.29 | -0.98 | 0.01 | 0.00 | 10/15/2026 | 10/27/2026 3:59:55 PM EST |