it is crystal clear that they are planning for a gr8 trade .....

FIIs are net buyers in ..
Index futures   26 crores Rs
Index options  822 crore Rs
Stocks future    600 crores
and sellers in stock options  17 crores
so if we add todays options too they are having 4600 crores  options
and 26500 crores deliveries....
please refer http://dhanvarshagrp.blogspot.com/2010/09/danger-is-deepening.html
so it is crystal clear  that they are planning for a gr8 trade .....
and for that trade they are preparing themselves since 3  4 months...

FII trading activity on NSE and BSE on Capital Market Segment The following is combined FII trading data across NSE and BSE collated on the basis of trades executed by FIIs on 13-Sep-2010. FII trading activity on NSE and BSE in Capital Market Segment(In Rs. Crores) Category Date Buy Value Sell Value Net Value FII 13-Sep-2010 4589.56 2069.68 2519.88 Archives Domestic Institutional Investors trading activity on NSE and BSE on Capital Market Segment The following is combined Domestic Institutional Investors trading data across NSE and BSE collated on the basis of trades executed by Banks, DFIs, Insurance, MFs and New Pension System on 13-Sep-2010. DII trading activity on NSE and BSE in Capituyers in al Market Segment(In Rs. Crores) Category Date Buy Value Sell Value Net Value DII 13-Sep-2010 1193.63 2154.44 -960.81 Archives 5700 put raised by 189 % FTY     REFRESH As on 13-SEP-2010 15:30:36 Hours IST Instrument Type Underlying Expiry Date Option Type Strike Price Market Lot OPTIDX NIFTY  30SEP2010 PE 5700.00 50 Price Information Open Price 80.00 High Price 80.00 Low Price 43.55 Last Price 47.00 Prev Close 97.55 Close Price 47.15 Change from prev close -50.55 % Change from prev close - VWAP 53.41 Underlying Value 5760.00 Number of contracts traded 400706 Turnover in Rs. Lakhs 1152712.95 Open Interest 5937600 Change in Open Interest 3890100 % Change 189.99 Order Book Buy Qty Buy Price Sell Price Sell Qty 300 46.65 47.00 1250 550 46.60 47.25 400 600 46.55 47.50 550 450 46.50 47.55 50 100 46.40 47.60 350 350950 Total Buy Qty Total Sell Qty 383800 Other Information Settlement Price - Daily Volatility 0.90 Annualised Volatility 17.27 Client Wise Position Limits 35904247 Market Wide Position Limits - 5700 call  OI reduced NIFTY     REFRESH As on 13-SEP-2010 15:30:36 Hours IST Instrument Type Underlying Expiry Date Option Type Strike Price Market Lot OPTIDX NIFTY  30SEP2010 CE 5700.00 50 Price Information Open Price 42.00 High Price 121.00 Low Price 41.60 Last Price 110.00 Prev Close 32.65 Close Price 109.95 Change from prev close 77.35 % Change from prev close - VWAP 80.43 Underlying Value 5760.00 Number of contracts traded 563969 Turnover in Rs. Lakhs 1629991.66 Open Interest 9136750 Change in Open Interest -2807400 % Change -23.50 Order Book Buy Qty Buy Price Sell Price Sell Qty 350 109.30 110.00 2000 25850 109.00 110.50 650 500 108.60 110.80 1500 7550 108.50 110.90 50 15000 108.25 111.00 1200 371700 Total Buy Qty Total Sell Qty 55400 Other Information Settlement Price - Daily Volatility 0.90 Annualised Volatility 17.27 Client Wise Position Limits 35904247 Market Wide Position Limits - 5600 pe OI  reduced NIFTY     REFRESH As on 13-SEP-2010 15:30:36 Hours IST Instrument Type Underlying Expiry Date Option Type Strike Price Market Lot OPTIDX NIFTY  30SEP2010 PE 5600.00 50 Price Information Open Price 36.80 High Price 36.95 Low Price 24.05 Last Price 26.20 Prev Close 51.40 Close Price 26.25 Change from prev close -25.20 % Change from prev close - VWAP 28.25 Underlying Value 5760.00 Number of contracts traded 365601 Turnover in Rs. Lakhs 1028846.91 Open Interest 8573700 Change in Open Interest -209950 % Change -2.39 Order Book Buy Qty Buy Price Sell Price Sell Qty 2300 26.15 26.20 50 10550 26.00 26.50 500 50 25.80 26.60 16250 3700 25.55 26.70 900 300 25.50 26.75 100 255500 Total Buy Qty Total Sell Qty 524450 Other Information Settlement Price - Daily Volatility 0.90 Annualised Volatility 17.27 Client Wise Position Limits 35904247 Market Wide Position Limits - 5600 call OI reduced more than that NIFTY     REFRESH As on 13-SEP-2010 15:30:36 Hours IST Instrument Type Underlying Expiry Date Option Type Strike Price Market Lot OPTIDX NIFTY  30SEP2010 CE 5600.00 50 Price Information Open Price 100.00 High Price 198.75 Low Price 96.60 Last Price 186.00 Prev Close 81.60 Close Price 186.30 Change from prev close 104.40 % Change from prev close - VWAP 143.88 Underlying Value 5760.00 Number of contracts traded 194003 Turnover in Rs. Lakhs 557164.98 Open Interest 7303850 Change in Open Interest -2275900 % Change -23.76 Order Book Buy Qty Buy Price Sell Price Sell Qty 200 185.10 186.50 1000 500 185.00 186.90 4650 200 184.90 187.00 3300 50 184.50 187.50 50 500 184.15 187.90 450 123600 Total Buy Qty Total Sell Qty 23050 Other Information Settlement Price - Daily Volatility 0.90 Annualised Volatility 17.27 Client Wise Position Limits 35904247 Market Wide Position Limits - pe 5500  OI increased NIFTY     REFRESH As on 13-SEP-2010 15:30:36 Hours IST Instrument Type Underlying Expiry Date Option Type Strike Price Market Lot OPTIDX NIFTY  30SEP2010 PE 5500.00 50 Price Information Open Price 20.00 High Price 20.00 Low Price 12.80 Last Price 15.75 Prev Close 27.15 Close Price 15.35 Change from prev close -11.40 % Change from prev close - VWAP 15.29 Underlying Value 5760.00 Number of contracts traded 234964 Turnover in Rs. Lakhs 647947.30 Open Interest 10870150 Change in Open Interest 819650 % Change 8.16 Order Book Buy Qty Buy Price Sell Price Sell Qty 3850 15.75 15.95 200 100 15.50 16.00 300 1000 15.20 16.20 500 1050 15.15 16.25 2050 7250 15.05 16.30 100 279100 Total Buy Qty Total Sell Qty 357350 Other Information Settlement Price - Daily Volatility 0.90 Annualised Volatility 17.27 Client Wise Position Limits 35904247 Market Wide Position Limits - CE 5500 OI reduced .. NIFTY     REFRESH As on 13-SEP-2010 15:30:36 Hours IST Instrument Type Underlying Expiry Date Option Type Strike Price Market Lot OPTIDX NIFTY  30SEP2010 CE 5500.00 50 Price Information Open Price 171.30 High Price 288.35 Low Price 171.30 Last Price 274.10 Prev Close 155.50 Close Price 274.95 Change from prev close 118.60 % Change from prev close - VWAP 232.67 Underlying Value 5760.00 Number of contracts traded 60057 Turnover in Rs. Lakhs 172143.48 Open Interest 4963250 Change in Open Interest -1139350 % Change -18.67 Order Book Buy Qty Buy Price Sell Price Sell Qty 300 272.65 275.90 50 50 272.45 276.00 50 1000 272.25 277.50 800 50 272.10 277.65 500 1500 271.05 278.00 50 149600 Total Buy Qty Total Sell Qty 17350 Other Information Settlement Price - Daily Volatility 0.90 Annualised Volatility 17.27 Client Wise Position Limits 35904247 Market Wide Position Limits - these all figures are clearly indicating that they are net put buyers ......in index options ...will you  try to find out the answer ...why they are buying index put options ...when they are not buying  index futures ?????????