The leveraged indexed ETFs are used by very tactical investors, and so there we have bull and bear funds. They have daily betas, which means that essentially they're to be used by people expressing a very short-term view of the markets.
They're not appropriate for investors. You have to have the right attention span and risk tolerance, and essentially, they're good for traders. They're not really good for investors.
I think that most market participants should not use these products...and I'm not sure what the proper number is, but let's just say 95% of market participants should not use these sorts of products. Because they're looking to invest for longer than the timeframe for these sorts of products.