World shares have traded mostly lower after Wall Street had its worst day since the start of the Iran war over growing doubts about a de-escalation. On Friday, oil prices have gained more than 1%, and U.S. futures are mostly unchanged. President Donald Trump said he was postponing a threatened attack on Iran's energy facilities shortly after U.S. stocks closed with sharp falls on Thursday. The S&P 500 slumped 1.7% for its worst day since January. The Dow Jones Industrial Average fell 1%, and the Nasdaq composite sank 2.4%, after Iran rejected a U.S. offer for a ceasefire.
