Russia’s ruble fell the most among major global currencies on Friday and the nation’s borrowing costs climbed after U.S. airstrikes on Syria dimmed hopes for improved ties under Donald Trump. The Russian currency weakened 1.4 percent against the dollar by 6:20 p.m. in Moscow, the most in almost a month, after Russian President Vladimir Putin slammed the attacks as an “act of aggression.” Stocks posted the steepest drop worldwide, credit default swaps climbed for the first time this week, and yields on local-currency government bonds advanced. Rebounding oil prices and attractive real interest rates have made the ruble one of the best-performing currencies in developing nations this year amid a global hunt for higher returns. Russian markets rallied after Trump’s November election, but the strikes, in response to Syrian leader Bashar al-Assad’s alleged use of poison gas to kill scores of civilians, show the chances of a detente are […]