NHYDY - Norsk Hydro operations slammed by cyberttack March, 19 2019 10:55 AM Norsk Hydro ASA ADR Norsk Hydro (OTCQX:NHYDY -0.8%) says it has been hit by an "extensive" cyberattack that has affected operations at several of its business areas.More news on: Norsk Hydro ASA, Norsk Hydro ASA, Commodities news, Stocks on the move, Read more ...