At National Commodity and Derivatives Exchange, refined soya oil for delivery in October fell by Rs 2.90 or 0.44 per cent to Rs 649.30 per 10 kg with an open interest of 15,200 lots.
Likewise, the oil for delivery in November contracts shed Rs 2.55 or 0.39 per cent to Rs 652.70 per 10 kg in 56,260 lots.
Market analysts said trimming of positions by participants due to subdued demand in the spot market against ample stocks position on higher supplies from producing regions, mainly led to the decline in refined soya oil prices at futures trade.