Micron (MU) plunged 17% overnight, while a whale that opened a $31 million long position shortly before the drop saw its unrealized loss reach about $5 million. The position was opened at $775.25 at around 11 p.m., before MU fell to a low of $650. As the stock rebounded to around $700, the loss narrowed to $3.12 million, according to on-chain analyst Ember.