Foreign institutional investors (FIIs) were net buyers of Rs 198.31 crore (provisional) today, according to data released by BSE.While FIIs made gross purchases of Rs 3,109.15 crore, gross sales totalled Rs 2,910.84 crore.FIIs were net buyers of Rs 946.40 crore on Tuesday, July 17, according to data released by Sebi today. While FIIs made gross purchases of Rs 3,890 crore, gross sales totalled Rs 2,943.60 crore.Mutual funds (MFs) were net sellers of Rs 103 crore on Tuesday. MFs made purchases of Rs 803.50 crore and sales of Rs 906.50 crore.