NEW YORK >> Safe-haven currencies saw increased demand today, with the U.S. dollar, the Swiss franc and the yen attracting buyers after Russia updated its nuclear doctrine in response to the escalating conflict with Ukraine.

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,

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.