Do Scarce Precious Metals Equate to Safe Harbor Investments? The Case of Platinum and Palladium

Table 4

Summary statistics of ARFIMA-GARCH and ARFIMA-APARCH models.

Precious metals	ARFIMA-GARCH				ARFIMA-APARCH
	-ARFIMA	ARCH	AIC	Log-likelihood	-ARFIMA	ARCH	Gamma	AIC	Log-likelihood
Platinum	−0.050; (0.041)	(1,1)	1.507	−4163.988	−0.046; (0.044)	(1,1)	−0.114; (0.028)	1.502	−4147.927
Palladium	−0.028; (0.090)	(1,1)	2.330	−6434.194	−0.027; (0.323)	(2,2)	−0.050; (0.236)	2.337	−6425.245

Note: , , and are significant at 10, 5, and 1% levels, respectively; values are in parentheses.