NTM Islam as a religion, which forbids usury all together.

Not only does it forbid usury (and not as in the definition of "high interest" but in terms of ALL interest, you lend someone 100$, 5 years later they still owe you 100$, not even 100.01$ is allowed), but Islamic banking/investment is different too in that it's not "insured" and there are no "bail outs". Your money gets invested (if you choose to, you can also deposit your money in accounts that don't get invested), and if the investments go south, you lose your money, if the investments go north, you get extra money.

Furthermore, there's heavy restrictions on what investments can be made into if they go against the faith, meaning yes banks don't invest in Alcohol or Casinos for example, but they also won't invest in industries creating "Fassad fel Ard" (Corruption in the land) so they probably wouldn't invest in shit like Blackrock.

Additionally, it bans 'engaging in transactions lacking "'material finality'. All transactions must be "directly linked to a real underlying economic transaction", which excludes "options and most other derivatives"' and bans high risk shit like options, futures, derivatives, forwards, and speculation, short selling, margin trading, day trading...etc..

Although to be fair, that form is rarely actually practiced and there's a lot of argument between scholars on what constitutes what in terms of interest and all that.

cc /u/penelopepnortney