Palm oil fell in Asian trading. Overnight weakness in rival vegetable oils on softer energy prices might have affected market sentiment amid encouraging progress in U.S.-Iran negotiations in Qatar, Kenanga Futures writes in a note. Improving production in Malaysia may have added further pressure, it adds. The Bursa Malaysia Derivatives contract for September delivery fell 50 ringgit to 4,507 ringgit a ton. (kimberley.kao@wsj.com)