Options/futures data for 10th Feb (EOD)

Summary:
1. The puzzle of 2 50-50 levels in the table continues! Despite almost 200 point tank below 5400, there is still significant OI of 5400PE/5300PEs. The only explanation I have is that these are covered puts (short Nifty+short 5400 or 5300PE). May be they are waiting to see if some significant level like 5180 (the Oct-Nov-Dec 2009 high) breaks?
2. 5400 and 5300 are 50-50 levels as of now but with negative bias
3. 5200 is the support as of now
4. Significant buying in 5100 and 5000PEs has been observed in last few sessions.
5. PCR tanked further from 1.07 to 1.01


Nifty Futures:
2.56Cr OI flat -- Remember that OI is up 32% from beginning of the series. And that amounts to 60L increase in OI. I would assume most of them are shorts!


Banknifty Futures:
10.4L OI down 6% -- In last 2 days OI is down almost 13%. BN OI is now almost same as what it was at the beginning of the series.