Comment on Taxation for Traders - Introduction
All Intraday F&O activity including F&O intraday is considered non speculative business income.
Here’s the blog: http://zerodha.com/varsity/chapter/taxation-for-traders/
Quoting from the blog: “Non-speculative business income – Income from trading F&O (both intraday and overnight) on all the exchanges is considered as non-speculative business income as it has been specifically defined this way. “