Foreign institutional investors (FIIs) were net buyers of Rs 101.30 crore on Tuesday, January 16, according to data released by Sebi today.While FIIs made gross purchases of Rs 1,787 crore, gross sales totalled Rs 1,685.70 crore.Mutual funds (MFs) were net buyers of Rs 71.84 crore on Tuesday. MFs made purchases of Rs 582.72 crore and sales of Rs 510.88 crore.