The December vaida was down while the January contract was unchanged on the forward cottonseeds oilcake market on Monday in the process of trading, dealers said. The December vaida closed at Rs 1304.80, opened with 30 paisa loss at Rs 1304.50 in the early session, dealers said. The January contract closed at Rs 1450.00 and it commenced with no change at the wee hours, they said.