The July vaida was down on the forward cottonseed oilcake market on Thursday in the process of trading, dealers said. The July vaida closed at Rs 1842.50 and it opened with a decline of 50 paisa at Rs 1842.00 in the early session, they said. The December vaida ended at Rs 1300.00, it commenced the day at the same rate in the wee hours, they said.