Why are dates in 2 different formats in BANKNIFTY symbols?

JeetKumar

In the instruments.csv file there are 2 types of symbols for BANKNIFTY.
Can someone please explain these to me?
I understand that 30900 is strike and "CE" is the type of option, but why are the dates given in 2 different formats?

BANKNIFTY20FEB30900CE
BANKNIFTY2020630900CE


Thanks

sujith

BANKNIFTY20FEB30900CE is a monthly expiry instrument and BANKNIFTY2020630900CE is a weekly expiry instrument.
You can refer to this thread to know more about the weekly tradingsymbol format.

rakeshr

@JeetKumar

BANKNIFTY20FEB30900CE

This is monthly Banknifty contract i.e BANKNIFTY FEB 30900 CE.

BANKNIFTY2020630900CE

This is weekly Banknifty contract i.e Bank Nifty 6th Feb 30900 CE.

JeetKumar

@Sujith and @Rakesh
Many thanks to both of you for clarifying this.
Specially the part about using O/N/D for months of Oct/Nov/Dec in weekly symbol.

Thank you so much!