Investing.com -- Memory chip stocks have posted significant gains over the past month, with Micron Technology (NASDAQ: MU) climbing 90%, Sandisk Corporation rising 82%, and SK hynix advancing 78% over the 30-day period.

Micron shares jumped more than 20% over two days of trading this week. According to Lynx Equity Strategies analyst KC Rajkumar, the inclusion of Micron’s CEO in President Trump’s delegation to China likely contributed to the stock’s outsized gains. The list of CEOs in the entourage became public Monday, though it may have begun circulating late last week. Notably, Nvidia CEO Jensen Huang was not invited on the trip, as the White House focused the delegation on agriculture and commercial aviation matters.

Labor unrest at Samsung’s DRAM and NAND fabrication facilities has also drawn renewed investor attention as a potential worker strike date approaches. Rajkumar noted that concerns about a prolonged work stoppage have been building for weeks.

"Even if labor negotiations were to conclude successfully, we doubt if memory prices are likely to give up gains," Rajkumar said.

Over the past two trading days, Sandisk gained 15%, Intel (NASDAQ: INTC) rose 18%, AMD (NASDAQ: AMD) advanced 12%, and the Sox index climbed 8%.

Rajkumar suggested that Micron may have reacted more positively to semiconductor capital equipment CEOs not being included in the Trump delegation than to its own CEO’s participation. The likelihood of Yangtze Memory Technologies and ChangXin Memory Technologies receiving import waivers now appears lower than previously expected, which removes a potential negative for Micron.

Whether Micron obtains favorable treatment regarding import restrictions into China remains to be seen, according to Rajkumar.