Bond yields and international stock markets fell on the possibility of an imminent war in Europe, after weekend diplomacy between Western leaders and Russian President Vladimir Putin failed to yield a breakthrough.

Futures for the S&P 500 slid 0.9% in volatile trading on 14 February. Contracts for the technology-focused Nasdaq-100 and the Dow Jones Industrial Average fell 1.1% and 0.8%, respectively. If the losses continue through the opening bell, they will compound a decline for stocks sparked on 11 February by US warnings that Moscow could invade Ukraine at any moment.