For those that can buy in the US: have a look at some of VIX ETFs. VXX is 1x, but there are some 2x and 3x ones. There must surely be very minimal downside risks** and good chances of a bit of upside. And this is the positive, not inverse ETFs about which the converse could be said.
pmd3nka ** Vix is around an all time low.
I hope to be long VXX by the end of the week.
