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What are the alternatives to compound interest for a Muslim?
My understanding of Muslim finance is that you may not lend money at interest, including investing in in things that pay interest. However you may still make investments: it just has to be in places where you get a share of profit, rather than a fixed rate of return. You would be better asking the Muslim community specifically for more details. The benefits of compound interest apply, more or less, to other non-fixed-interest investments. If you invest $1000 in a business and get a 10% rate of return, you have $1100 to invest in your next venture, which means it will be more profitable and so on. That's why the growth happens, not specifically because it is interest. Stocks do not pay interest, and the 'magic' applies to them too. The fact that you might lose as well as win complicates things, but doesn't change the principle.