Why memory chip stocks are rallying again: Micron and Sandisk surge as AI optimism returns

Memory chip stocks are rallying big after a week of poor performances.  Companies including Micron Technology (Nasdaq: MU) and Samsung Electronics Co. (KSE: 005930.KS) saw their shares rise on Thursday, July 30, and into premarket trading Friday, July 31.  South Korea’s Kospi (Korea Composite Stock Price Index) recovered and then some from its fall earlier this week, jumping almost 18% on Friday. Its growth was led by a similar turnaround from Samsung and Sk Hynix Inc. (KSE: 000660.KS),…