Is investing in S&P 500 index funds or ETFs like VOO or SPY halal?
A standard, unscreened S&P 500 fund such as VOO or SPY is not Shariah-compliant, because the index includes conventional banks, insurers, alcohol companies, and other businesses that fail either the industry screen or the financial-ratio screen used by every major Islamic index provider. The issue isn't that index investing itself is impermissible — passive, diversified investing is broadly welcomed in Islamic finance — it's that this particular 500-company basket was never filtered for Shariah compliance in the first place. If you already hold a standard S&P 500 fund, don't panic; review your holdings and consider transitioning to a screened alternative or purifying non-compliant income, and if you haven't invested yet, go directly to a Shariah-screened index fund instead.