Below we highlight the 25 best performing stocks of the Bloomberg World index in 2007. The Bloomberg World index contains 5,175 global stocks from 85 countries. As shown, Romanian company CMCM is up the most this year at 8,965%. CMCM is followed by Mongolia Energy and Nority International. One US company was able to crack the top 25. First Solar (FSLR) is up 811% on the year.