NFA steps up palay buying as buffer stock in Negros Occidental drops. BACOLOD CITY — The National Food Authority (NFA) in Negros Occidental has intensified its palay procurement program to bolster its dwindling buffer stock, an official said on Thursday, Oct. 22. NFA Negros Occidental Branch Manager Cherrybeth Gevero said their buffer stock has critically dropped to one-day supply, far below the agency’s mandated 15-day reserve. To.