JUN series DAY-16 Nifty=5146 (-19)
In this JUN series we have 5 DOWN and 11 UP days as follows.
DUUUUUDUUDUDUUUD
Now Expiry Zone continues to be (5100~5200).
Things like Open Interest or PCR have no relevance in Expiry Period due to
Time Decaying.Another thing, how can you expect Bank Nifty ended in
positive ,when Rupee breached 57 level.
THETA (time decay):
The option's theta is a measurement of the option's time decay.
The theta measures the rate at which options lose their value,
specifically the time value, as the expiration date draws nearer.
Generally expressed as a negative number, the theta of an option
reflects the amount by which the option's value will decrease every day.
(courtesy:theoptionguide.com)