After settlement FIIs are left holding 72% of the longs and 10% of the shorts in Index Futures. They covered more then 50% of their total short Index Futures holdings while less then 10% of long Index Futures holdings were liquidated on expiry day.
SEP Nifty Future series is showing maximum Open Interest at the beginning of a series this year
Participantwise Ownership in %
FII Index Future Long and Short Open Interest vs Nifty Future