How did fish sauce make Vietnam businessman a billionaire?
Shares of Vietnamese firm Masan Group, which produces sauce made from fermented fish that is widely used in Vietnamese cuisine, have more than doubled in last six months. With this, Masan's Founder Nguyen Dang Quang has become a billionaire with a $1.2-billion fortune. An estimated 95% of Vietnam households use minimum one Masan product, according to research firm Kantar.