December ETF Roundup: $1 Trillion And Counting (VWO, SPY, IAU, GLD, PFF, SDY, JNK, BND, HYG, VTI, VXX, UUP, FXI, DIA, TBT)

U.S. ETF assets topped $1 trillion for the first time in December, as a year-end rally in global equity markets and another strong month of inflows pushed the industry past the milestone. ETF assets