Jim Cramer explains what's behind these markets moves, both up and down. He thinks changes are being caused by short sellers whose bets have gone awry.
Citron Research's Andrew Left sends shares of Ubiquiti tumbling after he calls the company a fraud. Jim Cramer says he prefers other names to UBNT stock, which appears overvalued.
With the former Cisco CEO set to step down as chairman, the path is clear for his successor to make big acquisitions and other moves to overhaul Cisco's strategy and culture.
