kuala lumpur march 4 reuters  malaysian palm oil futures fell more than 5 on friday but were set for their biggest weekly gain since october on concerns over disrupted sunflower oil supply from the black sea region due to russias invasion of ukraine the benchmark palm oil contract for may delivery on the bursa malaysia derivatives exchange fell 353 ringgit or 519 to 6455 ringgit 154315 a tonne in early trade after declining 234 overnight for the week it has gained 83 so far in what would be its second straight weekly rise  the worlds biggest palm oil buyers china and india are slowing down imports as prices rocket to historical high levels even as the russiaukraine crisis squeezed global edible oil supply industry officials said in a uob kay hian conference on thursday read more  us president joe bidens administration is studying whether waiving biofuel blending mandates could help offset a surge in prices for key food ingredients like corn and soy oil following russias invasion of ukraine two sources familiar with the matter said read more  soyoil prices on the chicago board of trade were down 15 dalians mostactive soyoil contract fell 2 while its palm oil contract eased 24  palm oil is affected by price movements in related oils as they compete for a share in the global vegetable oils market  asian shares took a beating and oil prices jumped as a report of a nuclear power plant on fire amid continued fierce fighting between ukraine and russian troops further unnerved investors  oil prices rebounded as the disruption of russian oil exports because of western sanctions outweighed the prospect of more iranian supplies from a possible nuclear deal