You cannot borrow money an IRA. I wonder if that justifies the use of a 2-beta S&P 500 ETF such as SPUU in an IRA for the most aggressive investors. The S&P 500

You cannot borrow money an IRA. I wonder if that justifies the use of a 2-beta S&P 500 ETF such as SPUU in an IRA for the most aggressive investors. The S&P 500 is more diversified than the Nasdaq 100 and should have higher risk-adjusted returns in the long run.