Performance chasing is alive and well.  I suspect if international and especially emerging market stocks had not done so well for the last few years we would not be seeing this trend.

The Financial Times reports that last year, a remarkable 92.5 percent of all US equity fund inflows went into international equities – international funds captured $148.6bn and domestic funds just $12.1bn, according to the Investment Company Institute. In seven of the past eight months of the year, US retail investors pulled money out of US funds to invest elsewhere.