June 9, 2014 is the first trading day for Apple stock (AAPL) following the Seven-for-One split.
AAPL closed at $645.57 ($92.22 on post-split adjustment) on Friday, June 6, 2014. After the Seven-for-One split, AAPL closes at $93.70 on Monday, June 9, 2014.
Surprisingly, Forbes, a huge business/financial publications does not really understand how stock split works.
According to Forbes, AAPL plummeted by $551.87. Not sure if Forbes is either incompetent or lying.