Total PCRatio reached a high of 1.55, in recent 8 cases, average next day return is -0.07% with 5 times up and 3 times down.
SPY big drop on Firday, For past 83 cases, average next day return is positive though with big standard deviation:
+——+—–+—————+——————-+
| ticker | cnt | avg(ndpctchg) | stddev |
+——+—–+—————+——————-+
| SPY | 83 | 0.198434 | 2.3339 |
+——+—–+—————+——————-+
Among this 83 cases, the next day return: 50 up and 33 down ( 60% vs 40%), up day average return 1.29%, while Down day average return: -1.45%