Foreign institutional investors (FIIs) were net buyers of Rs 781.25 crore (provisional) on Wednesday, according to data released by BSE.While FIIs made gross purchases of Rs 3,538.85 crore, gross sales totalled Rs 2,757.60 crore.FIIs were net buyers of Rs 501.50 crore on Tuesday, April 24, according to data released by Sebi on Wednesday. While FIIs made gross purchases of Rs 3,283.40 crore, gross sales totalled Rs 2,781.90 crore.Mutual funds (MFs) were net buyers of Rs 361.10 crore on Tuesday. MFs made purchases of Rs 1,142.10 crore and sales of Rs 781.10 crore.