US Testing and Measurement Giant Loses 6 Trillion Won in a Day

On March 26, Keysight Technologies Inc. (NYSE: KEYS) plunged 8.35% to close at $330 on the New York Stock Exchange. Trading volume surged to roughly 2.41 million shares as investors pulled back amid a broader tech and semiconductor sector correction. In a single session, the company’s market capitalization shrank by about $4.3 billion (approximately ₩6.1 trillion), reflecting sharply weakened sentiment across technology stocks.

Earlier this week, Keysight reported record-high orders and revenue for the second quarter of fiscal year 2026, driven by strong demand for AI infrastructure testing and 5G/6G network validation. The company also expanded its communications and network testing portfolio through the acquisition of Spirent Communications’ optical solutions and electronic design automation (EDA) assets. Analysts say these strategic moves underpin Keysight’s long-term growth prospects, even as the stock weathers short-term pressure.

Headquartered in Santa Rosa, California, Keysight Technologies is a leading provider of electronic measurement and test equipment. Spun off from Agilent Technologies in 2014, the company supplies radio-frequency (RF) test instruments and network validation solutions to diverse industries—including telecommunications, semiconductors, automotive, and aerospace. It is recognized globally as a core partner in next-generation communications, autonomous vehicle testing, and quantum computing R&D.