If the S&P 500 continues to rally up to around 2000, then I am considering using inverse ETF's like ProShares SH and SDS (leveraged) to short. I have always heard that over a certain period of time the value of these become unstable due to the fact that they have to be rebalanced every day. I'm just wondering how long one could hold these ETF's before worrying about the stability of the value. My time horizon would probably be a few weeks to a few months...depending on the market and whether or not I had to stop out.
Any thoughts on using these?
Any thoughts on using these?