Today's NYSE total volume has a run-rate around 15-20% below its average for this time of day. This is 2 standard deviations below average and most notably the lowest non-holiday day/week volume so far. At the same time, volume in the futures market is even worse with S&P 500 e-mini futures (ES) trading volumes around 30% below their recent average. It is perhaps no surprise then that ES is jiggling in a narrow 3pt range between its lows and its VWAP/unch level.
NYSE Volume (averag run-rate for time of day) - spike down volumes are holidays (and July 4th week):
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S&P 500 e-mini futures volume compared to recent average...
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Charts: Bloomberg