Vladimir Putin has approved changes to Russia’s nuclear doctrine, setting out new conditions under which the country would consider using its arsenal. The doctrine now says an attack from a non-nuclear state,

Safe-haven assets bounced sharply on Tuesday, after a warning from Russia over its updated nuclear doctrine that was aimed at making possible enemies aware of inevitable retaliation for an attack on the country or its allies.

U.S. stock futures fell, as did bond yields, following reports that Russian President Vladimir Putin approved a change to the country’s nuclear doctrine. The move would allow a Russian nuclear response to conventional weapon usage and comes after the U.