Hi All I have been using e-mini futures contract ES_F (S&P500) as a short hedge against my portfolio for a number of months. Whilst it has worked well since i only hold a few contracts max at any one time it is very lumpy when i buy or sell as i cant scale in or out. I am therefore thinking about using an x2 inverse S&P500 etf in its place. I am obviously concerned about tracking errors as i could hold this for a number of months and would scale up or down based upon the long side of my holdings and my market sentiment. Any suggestions on what to use. I have looked at SDS and a couple of others or should i just short a long etf? Best A.