I have a robust ES trading system using Daily bars, holding trades up to about 2 weeks and building positions up to 10 contracts at a time. I don't have enough account capital spare for this, so I looked first at SPY. If I traded 100 share lots, then my max position size would be equivalent to just 2 x ES, which is very manageable. But then I looked at SPY options and the leveraged ETFs, SSO etc. Assuming a simple long option strategy : ATM and a couple of months out, so low time decay, could someone clarify for me which is the better approach, please - SPY option or leveraged ETF ? Thanks, J.