How big players knows what is going to happens in LUPIN on 7th november 2017. Do retail investor has any change to invest and earn?

at 1pm price of lupin was 1030 on 7th of november 2017
after just 20 minute rate was 870rs
at 13.04 corporate announcement was made on bse website of usfda warding. but selling started from 1pm itself.
so selling started before 4 minute of announcement.
THis can only happen with some news that was known to big players.
How do they come to know all this before it’s known to general public?
and just 1 day before see the target given to public


And see huge holding of mutual fund in lupin. Aren’t we call them big players and institution

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