I have deposited a sum of money in one of the investment banks that are
widespread here. In fact other types of banks, including Islamic ones, have no room here for they are subject to confiscation and insurance laws. Please be informed that I participate in no commercial activity to invest my money in as I work in a governmental job.
It is impermissible for you to deposit your monetary savings in usurious investment banks even if you participate in no commercial activity. In fact, this falls under participation in usurious investment and cooperation therein. Moreover, there is a multitude of investment methods other than banks, including trustworthy speculation companies. (Part No. 13; Page No. 362)
May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.