First Horizon National Corp. [stock FHN][/stock] on Friday reported a $55.7 million net loss — 27 cents per share — for the fourth quarter 2008, less than half the loss reported the previous quarter. After reporting heavy losses in mid- and late-2008 and receiving a $866,540,000 injection from the TARP as a transaction under the Capital Purchase Program on Nov. 14, 2008, the company’s balance sheet appears to be stabilizing somewhat.