Nifty Oct future is trading at a premium of 100

Nifty cash is trading at around 10450 and nifty oct future is trading at around 10550.
what’s happening??

This is common at beginning of the month. Now it spot at 10521 and Oct fut at 10565.

The Futures price starts moving only after 9.15am. You must have checked the values during pre-open.

It was after 9:16

buying opportunity is gone