Foreign institutional investors (FIIs) were net buyuers of Rs 461.70 crore on July 27, Thursday according to data released by Sebi today.While FIIs made gross purchases of Rs 1922 crore, gross sales totalled Rs 1460.30 crore.Mutual funds (MFs) were net buyers of Rs 262.80 crore on Thursday. MFs made purchases of Rs 895.91 crore and sales of Rs 633.11 crore.