AI Data Center Specialization Boosts U.S. Telecom Test Equipment Stocks, Surging 20% After Earnings Release

VIAVI Solutions Inc. (NASDAQ: VIAV) shares climbed 22.42%, closing at $52.85 on the Nasdaq on the 29th, with trading volume swelling to 5.48 million shares.
The company’s market capitalization rose by roughly $3.5 billion (about 4.7 trillion KRW) in a single day, reaching $12.2 billion (approximately 17 trillion KRW), as investor demand surged following its third‐quarter fiscal 2026 earnings release.
VIAVI reported that third‐quarter fiscal 2026 revenue grew 42.8% year-over-year to $406.8 million (around 570 billion KRW), and non-GAAP diluted EPS jumped to $0.27.
Management projected fourth-quarter revenue between $427 million and $437 million (roughly 600 billion to 610 billion KRW), signaling continued growth. On the same day, a Schedule 13G filing revealed that Vanguard Portfolio Management holds a 7.75% stake in the company.
Headquartered in Chandler, Arizona, VIAVI Solutions develops network test and measurement equipment for telecommunications and data centers, as well as optical security solutions. The mid-cap company was spun off from JDS Uniphase in 2015.
Serving telecom operators, cloud providers, and aerospace and defense clients, VIAVI supplies high-speed optical network testing and anti-counterfeiting optical coatings, positioning it to benefit from increased investment in AI data centers.