Foreign institutional investors (FIIs) were net sellers of Rs 133.50 crore on July 11, Tuesday according to data released by Sebi today.While FIIs made gross purchases of Rs 809.60 crore, gross sales totalled Rs 943.10 crore.Mutual funds (MFs) were net sellers of Rs 16.20 crore on Tuesday. MFs made purchases of Rs 274.64 crore and sales of Rs 290.84 crore.