The May vaida was sharply down and the July contact, however, was slightly up on the forward cottonseed oilcake market on Thursday in process of trading, dealers said. The May vaida that had closed at Rs 785.00 commenced with a steep decline of Rs 2.00 at Rs 783.00. The July contract which closed at Rs 850.60 posted a gain of 20 paisa at Rs 850.80 in the early hours, they added.