I recall from back in the days when I was studying aircraft design that it is possible for an AOA in cruise to be negative. We studied some NACA profiles on which we got -1.5° for cruise lift, and much higher negative values for zero lift point. Full explanation has long left my brains, but reduction of induced drag was involved.
Whether that value is normal for the Airbus I cannot say.
Last edited by Piper19; 30th Dec 2016 at 02:22.