US equities have a smoothed P/E of approximately 24 whereas emerging markets average P/E is 16. Combine that with the potential of the US dollar uptrend (which started in summer of 2014) unwinding (adding emerging market native currency appreciation potential) and higher yields in emerging markets (an average of about 6.5% based on my math).
It seems like there is an opportunity here, if even only for normalization of valuations. I would suspect that liquidity would continue to be drawn, perhaps at an even faster pace, to EM equities and bonds (as it has been since early 2016) as the US dollar rally unwinds.
Full disclosure: I have been investing in EM equities and bonds since January, 2016 when I felt an enormous opportunity was on the horizon.