On its December 31, 2017, balance sheet, Sheridan Company reported its investment in equity securities, which had cost $530000, at fair value of $504000. At December 31, 2018, the fair value of the securities was $522000. What should Sheridan report on its 2018 income statement as a result of the increase in fair value of the investments in 2018?

$0.

Unrealized gain of $18000.

Realized gain of $18000.

Unrealized loss of $8000.