Can we invest money in banks on floating interest?

Bismillahi Ta’ala

Walaikum Assalam Warahmatullah

It is not permissible to invest money in banks on floating or fixed interest.

As for investment in the banking institutional itself, please read the following answer: https://fatwa.ca/stocks-investment-bank/

Wallahu A’lam

And Allah Ta’āla Knows Best
Mufti Faisal al-Mahmudi