Foreign institutional investors (FIIs) were net buyers of Rs 1,286.03 crore (provisional) on Friday, according to data released by BSE. While FIIs made gross purchases of Rs 3,477.32 crore, gross sales totalled Rs 2,191.29 crore.Domestic institutional investors (DIIs) were net sellers of Rs 260.42 crore (provisional) on Friday. While DIIs made gross purchases of Rs 976.99 crore, gross sales totalled Rs 1,237.41 crore.FIIs were net sellers of Rs 46.60 crore on Thursday, September 13, according to data released by Sebi on Friday. While FIIs made gross purchases of Rs 2,458.50 crore, gross sales totalled Rs 2,505.10 crore.Mutual funds (MFs) were net buyers of Rs 80.20 crore on Thursday. MFs made purchases of Rs 769 crore and sales of Rs 688.80 crore.