Univariate GARCH estimates

WTI

Corn

Wheat

Soybeans

ARCH a

0.0552

(0.0286)

0.0573

(0.0178)

0.0398

(0.0163)

0.0508

(0.0159)

GARCH β

0.9245

(0.0382)

0.9335

(0.0188)

0.9500

(0.0200)

0.9386

(0.0187)

Log-likelihood

72398.71

7982.05

7560.59

8343.49

Combined

31124.83

AIC

−62233.65