ETF investors didn't just buy the dip in the market, they absorbed it, investing about $12 billion a day over the past 5 days, with all 17 of the largest ETFs being ETFs (not sure I've ever seen that happen). Vanguard customers and Dagens are very different players playing very different games, but they definitely agree on one thing - buying patches. - BBG senior ETF analyst, Eric Balchunas.