Foreign institutional investors (FIIs) were net buyers of Rs 21.90 crore on Monday June 19, according to data released by Sebi today.While FIIs made gross purchases of Rs 1,099 crore, gross sales totalled Rs 1,077.00 crore.Mutual funds (MFs) were net sellers of Rs 2,178.93 crore on Monday. MFs made purchases of Rs 4,336.33 crore and sales of Rs 6,515.26 crore.