Foreign institutional investors (FIIs) were net buyers of Rs 1093.80 crore on Friday, October 13, according to data released by Sebi today.While FIIs made gross purchases of Rs 2580 crore, gross sales totalled Rs 1486.20 crore.Mutual funds (MFs) were net sellers of Rs 40.77 crore on Friday. MFs made purchases of Rs 448.55 crore and sales of Rs 489.32 crore.