There has been massive inflows into exchange-traded funds in 2017, but the bulk of that money has gone into a vanishingly small part of the industry, according to a FactSet analysis. The vast majority of funds have been left to essentially fight over the scraps. ETFs have seen net new inflows of $250.2 billion thus far this year; half of that money—50.5%, to be exact—has gone to only 20 funds. Read the original story from MarketWatch.