In a nutshell, today was the lowest volume and narrowest range since the all time high, one year ago...
Today's S&P ETF volume was the lowest full day volume in 18 months (red line). Today was also a narrow range day. The days with the narrowest (high-low) range in the past 18 months, are circled in red. May 22nd, 2015 had the narrowest range (6 S&P points). Today's range was 7 points...
Lowest five day volume since the end of December...
Oil ETF:
What could go wrong?
Atlas Shrugged. Indeed.
World ex-U.S. versus S&P ETF: