| Term | Coeff | SE | t-stat | P-Value |
| (Intercept) | 2,401,290 | 85,168 | 28.20 | 0.00 |
| DFeb | 50,976 | 102,531 | 0.50 | 0.62 |
| DMar | 186,509 | 102,626 | 1.82 | 0.07 |
| DApr | 193,334 | 102,780 | 1.88 | 0.06 |
| DMay | 156,254 | 102,991 | 1.52 | 0.13 |
| DJun | 139,804 | 103,258 | 1.35 | 0.18 |
| DJul | 270,399 | 103,991 | 2.60 | 0.01 |
| DAug | 170,899 | 103,471 | 1.65 | 0.10 |
| DSep | 91,241 | 103,587 | 0.88 | 0.38 |
| DOct | 116,540 | 103,771 | 1.12 | 0.27 |
| DNov | 162,265 | 104,030 | 1.56 | 0.12 |
| DDec | 174,118 | 104,369 | 1.67 | 0.10 |
| DTax | −872,334 | 99,982 | −8.73 | 0.00 |
| Zt | −79,785 | 79,378 | −1.01 | 0.32 |
| Zt2 | −10,461 | 30,231 | −0.35 | 0.73 |
| Zt3 | 107,666 | 38,177 | 2.82 | 0.01 |
| Zt × DTax | 574,225 | 140,373 | 4.09 | 0.00 |