At the National Commodity and Derivatives Exchange, refined soya oil for delivery in December declined by Rs 3.80, or 0.64 per cent to Rs 588.45 per 10 kg with an open interest of 87,995 lots.
Likewise, the oil for delivery this month shed Rs 2.85, or 0.49 per cent to Rs 583.40 per 10 kg in 39,610 lots.
The exchange opened for the evening session as it remained closed in the morning for 'Guru Nanak Jayanti'.