Note 8. - Financial investments

The detail of Non-current and Current financial investments as of March 31, 2019 and December 31, 2018 is as follows:

	Balance as of March 31, 2019		Balance as of December 31, 2018
	($ in thousands)
Fair Value through OCI (Investment in Ten West link)		6,034		6,034
Derivative assets		6,297		11,571
Other receivable accounts at amortized cost		53,055		35,065
Total non-current financial investments		65,386		52,670
Contracted concessional financial assets		152,230		159,128
Derivative assets		1,481		1,582
Other receivable accounts at amortized cost		89,314		80,124
Total current financial investments		243,025		240,834

Investment in Ten West Link is a $12.5 million interest in a 114-mile transmission line in the U.S.

The increase of Non-current other receivable accounts at amortized cost is primarily due to the $19.9 million advance payment the Company made in January 2019 for the acquisition of Befesa Agua Tenés S.L.U. (see Note 1 for further details).