By Danilo Masoni MILAN, June 17 (Reuters) - Stocks edged up and currencies were subdued on Wednesday ahead of Kevin Warsh's debut as Federal Reserve chair, while oil prices remained near three-month lows, easing inflation pressure and pushing bond yields lower. Brent crude fell as far as $77.75 a barrel, down more than a third from April peaks after reports the United States may waive sanctions on Iranian oil under a deal to end the war. It was last up 0.4% at $79.29.