Business 05/17/201605/17/2016May 17, 2016Berkshire Hathatway takes a $1.1bn stake in US tech firm - Investors go for gold - British artist sells copies of masterpieces - Artisan coffee roasters’ supply problems - Portugal Rolls Back Austerityhttps://p.dw.com/p/1IoqLAdvertisement Business 05/17/2016