AI Investment Surge Leads to 12% Jump… Semiconductor Equipment Stocks Gain Over $4 Billion in a Day

Nasdaq‐listed MKS Inc. (MKSI) closed up 11.9% on the 6th, trading at $321.99 per share and lifting its market capitalization to about $21.6 billion (roughly KRW 30 trillion). In a single day, its market value rose by around $2.9 billion (over KRW 4 trillion), and trading volume exceeded 1.78 million shares, underscoring strong short-term buying momentum. (Source: stocktitan.net)

In its first-quarter 2026 results released after the market close, MKS reported revenue of $1.078 billion and adjusted earnings per share of $2.30, both above the high end of its guidance and consensus estimates. Management said demand is accelerating on the back of investments in AI data centers and advanced circuit substrates, and it expressed confidence in sustaining revenue growth and expanding cash generation from the second quarter onward. (Source: globenewswire.com)

Headquartered in Massachusetts, MKS supplies instrumentation, subsystems and process-control solutions across semiconductor manufacturing, electronics and packaging, and specialty industrial markets. Its global customer base spans the U.S., China and South Korea within the semiconductor value chain. With renewed momentum in the wafer-equipment cycle alongside AI infrastructure investment, investors are increasingly optimistic about the leverage effect of coupling high-value-added services with equipment sales. (Source: stockanalysis.com)