At December 31, 2015 and 2014, FutureFuel had investments in certain preferred stock, trust preferred securities, exchange traded debt instruments, and other equity instruments. These investments are classified as current assets in the consolidated balance sheet. FutureFuel has designated these securities as being available-for-sale. Accordingly, they are recorded at fair value, with the unrealized gains and losses, net of taxes, reported as a component of stockholders’ equity.

FutureFuel’s marketable securities were comprised of the following at:

The aggregate fair value of investments with unrealized losses totaled $15,571 and $15,688 at December 31, 2015 and 2014, respectively. As of December 31, 2015 and 2014, FutureFuel had no investments in marketable securities that were in an unrealized loss position for a greater than 12-month period, respectively.

In 2015, FutureFuel recategorized a net gain of $2,402 from accumulated other comprehensive income to a component of net income as a result of sales of available for sale securities. This amount totaled $5,712 and $334 of net gains in 2014 and 2013, respectively.