Why Brexit Is Poised To Unbottle Whisky Profits Galore! [Daily Mail, London] Jan. 24—INVESTORS could warm up their portfolios with a wee dram — as rare Scotch prices soar on the back of the Brexit deal. The United States imposed a 25 per cent tax on single malt Scotch imports a couple of years ago — punishment for the EU subsidising aircraft maker Airbus. It led to the price of some of the most collectable bottles of whisky falling by about ten per cent. Yet prices have started to rise again. Whisky broker Rare Whisky 101 has put together an RW Apex 1000 index that tracks the collective price performance of the 1,000 most sought-after whiskies.