Model

Mean

Standard deviation

Minimum

Maximum

ARMA(1,1)

999.46

169.53

780.31

1387.4

ARX(1)

1003.21

169.6

784.96

1391

GARCH(1,1)

996.9

163.45

783.17

1356

ARMAX(1,1)

1009.14

169.46

791.11

1397.44

GARCHX(1,1)

1006.48

163.71

793.65

1367.3

ARMA(1,2)

1020.95

171.9

822.15

1392.66

ARMA(1,3)

1004.47

171.76

783.86

1403.06