 CHICAGO, Oct. 19, 2021 PRNewswire -- Morningstar, Inc. Nasdaq: MORN, a leading provider of independent investment research, today reported estimated U.S. mutual fund and exchange-traded fund ETF flows for September 2021. Long-term mutual funds and ETFs had 58 billion of inflows in September, their lowest intake since October 2020 when they gathered 15 billion. 