Gold edged higher on Wednesday, extending gains for a fifth straight session, as optimism around the US-Iran peace deal eased concerns over interest rate hikes, while investors awaited further details on the deal and the Federal Reserve’s policy meeting. Fundamentals Spot gold was up 0.4% at $4,348.93 per ounce, as of 0107 GMT. US gold futures for August delivery rose 0.3% to $4,368.40. D