Australia's Treasury Wine drops to decade-low after flagging US asset impairment

Shares of Treasury Wine Estates TWE.AX fall as much as 6.4% to A$5.45, their lowest level since August 18, 2015

Stock among top laggards on the benchmark S&P ASX 200 .AXJO, which is largely flat

Winemaker expects to recognise a non-cash impairment of its U.S.-based assets, with all A$687.4 million ($450.04 million) of its goodwill for the region likely to be written off

YTD, stock down 49.8%, including the day's moves

($1 = 1.5274 Australian dollars)