ProShares Ultra S&P500 ETF (NYSEARCA: SSO ) may be a profitable swing trading instrument, but the 2X leverage factor is a source of drift. This article explains what "drift" means, reports it for 22 leveraged ETFs, with a focus on SSOFred runs the investing group Quantitative Risk & Value where he shares a portfolio invested in quality dividend stocks, and companies at the forefront of tech innovation. Fred also supplies market risk indicators, a real estate strategy, a bond strategy, and an income strategy ...