Closing / settlement price of futures?

i noticed today that futures bid-ask was far away from the closing price after the CAS session. ( at around 3:35 pm )

For example hindpetro Cas close was 354 but future was around 348-349. Noticed a similar discrepancy for PAGEIND.

Is it a market inefficiency ? is there any change in settlement price rules? Are we using VWAP now ?

I took the advantage :grinning_face_with_smiling_eyes::grinning_face_with_smiling_eyes:

Maybe it is bcz of some fund want to buy at closing price .

To take a arbitrage advantage like this , you need the holding of the stock in your demat , right ? (in case of sell )

or you need full cash equal to lot value (in case of buy ) , right ?

(Also, there is mismatch, you bought more quantity than sold.)

No u don’t need to ,u can borrow and sell, though I’m not sure if selling is allowed on the same day. I guess it actually happen today ,check the borrowed volume of HPCL

Also, I sold 700 shares from another demat that were held under MTF.

???