AI play Pure Storage soars 22% after touting it won a contract with an unnamed big tech company

Low-angle view of sign with logo on facade of technology company Pure Storage in the Silicon Valley town of Mountain View, California, October 28, 2018.Pure Storage shares rallied after announcing a contract with an unnamed "top four" AI hyperscaler in tandem with its fiscal third-quarter results.The shares were last up 23% in premarket trading.The data storage management company topped Wall Street's estimates and offered up strong fourth-quarter guidance. Pure Storage also upped its previously forecasted f ...