What happened in the last 7 NIO post-earnings days?

$NIO Inc(NIO.US)$ Overnight Avg. 11% gap (57% up); Open to Close Avg. 8% Change; Close to Close Avg. 16%.

However, the Avg.s are inflated by the 50%+ change last December. The median Close to Close Change is only 8%, half of the Avg.

50% gap-ups were reversed while only 33% gap-downs were reversed.