(Decanter) - Treasury Wine Estates, the wine division of brewing giant Foster's, has reported a fall in sales volumes in its first year as a standalone operation. One of the reasons could be the break with heavy promotional offers and deep discounting, Treasury Wine Estates'CEO said. Sales at the newly-formed company, owners of brands including Penfolds, Stags' Leap and Wolf Blass, have dropped by more than 6% in the first half of this year.