Why did the E-Mini just dump by 6 points on no news following the 6pm resumption of trading? Why not. Maybe someone hacked the vacuum tubes’ calendar file and instead of Tuesday has pegged tomorrow as a Wednesday which takes away any “fundamental” reason to ramp futures and stocks (or perhaps someone leaked that after Tuesday we get a Wednesday when nothing levitationally magical happens, which however makes no sense: after all someone could just as easily refute that rumor with another rumor that yet another Tuesday will follow a week from tomorrow, offsetting the Wednesday rumor).
That, or your run of the mill fat finger.
Or, worst case, someone actually, gulp, selling with premeditated intent (which in the new normal is at least a 2nd degree felony, somewhere up there alongside marketslaughter).