1) Can I trade in equities which does not consists of haram things?

2) Also can I trade Intraday in stock market if it is permissible?

3) Can we invest in bank stocks or trade. I have heard that we aren’t suppose to invest in them because we are unaware of their Investments which maybe involved in haram things?

1) Buying and selling stocks/shares is permissible as long as it does not involve haram transactions/acts.

2) The same would apply to intraday

3) You must ascertain that there is nothing haram like usury. If there is, then you cannot invest.