Foreign institutional investors (FIIs) were net sellers of Rs 52.10 crore on August 23, Wednesday according to data released by Sebi today.While FIIs made gross purchases of Rs 1007 crore, gross sales totalled Rs 1059.10 crore.Mutual funds (MFs) were net sellers of Rs 227.50 crore on Wednesday. MFs made purchases of Rs 306.28 crore and sales of Rs 533.78 crore.