The last 'Trade of the decade' I can recall has been, so far, an absolute stinker:

The China stockmarket (To be fair to the chap, it was a 2 - 3 year view and we are less than a year into it, more at the link ... and, errr, if you still like it its much cheaper now! :-D ):

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OK, so here's the newest 'trade of the decade', from Research Affiliates LLC, described as a sub-adviser to Pacific Investment Management Co. (PIMCO). (No, I don't know what a sub-adviser is either.)

"The exodus from emerging markets is a wonderful opportunity -- and quite possibly the trade of a decade -- for the long-term investor," Christopher Brightman, chief investment officer at Research Affiliates, said in a post on Pimco's website Wednesday. "We are increasingly confident of our positioning in emerging market stocks and bonds."

At least they aren't buying in at the top.

more at Bloomberg

What says ForexLive? I must admit I can see good points in their arguments.