AI Wiring Equipment Stocks Lose 15 Trillion Won in Market Value in One Day

Amphenol Corp. (APH), the U.S. electronic‐components manufacturer, plunged 5.31% on July 7 on the New York Stock Exchange, closing at $157.95. In a single day, the company’s market capitalization declined by roughly $9.8 billion (about 15 trillion KRW), leaving its total market value at approximately $194.3 billion (around 295 trillion KRW).

Analysts attribute the sell‐off to valuation concerns, institutional profit‐taking and a broader pullback in the tech‐equipment sector. Institutional net selling has been confirmed by Burney Co.’s recent disposal of roughly 26,000 Amphenol shares. Despite the drop, Amphenol reported first‐quarter 2026 revenue up more than 58% year-over-year—beating market expectations—and has raised its guidance for upcoming quarters on strong AI and data-center demand.

Amphenol is a global leader in the design and manufacture of electrical, electronic and fiber-optic connectors, cables and interconnect systems, supplying components to data centers, telecom, automotive, industrial and aerospace & defense markets. Recently, the company has expanded its portfolio through acquisitions—most notably MTS Systems and Commscope’s outdoor wireless and distributed antenna-system business for about $2.1 billion—positioning it as a key beneficiary of AI and cloud-infrastructure investment.