30 cent spread on FXP
It just started trading less than a week ago and already seeing volume crossing over 500,000. That is very impressive.
Proshares already has this market covered, rydex just offered some inverse funds last week, but I believe they are way too late. Proshares has taken investing to a whole new level, they have another 30 or more ETFs in the pipeline
As for Ultrabull China ETFs, proshares hasnt offered any yet, however, you are able to invest in Profunds, they do have an ultrabull mutual fund through profunds which is part of proshares.
FXP will be a buy soon
As for other Proshare ETFs
check out
EEV Emerging market 2x ultrabear short/compare it to EEM.
EFU as well.