Key Highlights

● Lumentum shares surged on Tuesday, September 29, 2026, closing at $972.47 after touching $981.74 during the session.

● Optical stocks rebounded a day after Citi forecast that optical switching would become an $11 billion market by 2030.

● Lumentum management said the Demand signal for 2027 continues to be incredibly strong, lifting confidence in future optical component orders.

● Coherent, Corning and Applied Optoelectronics also rose, and Corning signed a fiber deal with AT&T worth more than $3 billion.

Lumentum Holdings Inc. (NASDAQ:LITE) surged on Tuesday, September 29, 2026, closing at $972.47. The stock touched $981.74 during the session, and all readings showed a strong gain. The rebound came a day after Citi forecast that optical switching would become an $11 billion market by 2030, and the optics group reversed a selloff.

Why Citi's Call Matters

Lumentum makes lasers, optical transceivers and related components that carry data as light through networks and data centers. As AI computing clusters grow, the links between processors become a bottleneck, and optical technology is increasingly used to move data faster and with less power. Optical switching takes that a step further by routing signals optically rather than converting them to electrical form, and an $11 billion forecast for 2030 suggests a sizeable new Revenue pool.

Management's Message

Lumentum's own comments added to the confidence. Management said the demand signal for 2027 continues to be incredibly strong.

A Group Move

Coherent (NYSE:COHR) and Corning (NYSE:GLW) also rose, and Applied Optoelectronics gained. Corning had its own catalyst: a multiyear fiber and cable Supply agreement with AT&T worth more than $3 billion, which supports AT&T's plan to reach 60 million Americans with fiber by 2030. Semiconductors were strong across the board, with chip ETFs rising, though the recovery was uneven.

A Soft Market Around It

The S&P 500 slipped 12.85 points, or 0.17%, to 7,670.84, while the Dow Jones Industrial Average fell 131.59 points to 51,349.92 and the Nasdaq Composite finished nearly flat at 26,797.54. The Nasdaq-100 edged higher to 30,339.33. Long-term Treasury yields pressured stocks through the session, with the 30-year yield at its highest since 2002. The Conference Board's index of consumer confidence slid to 81.9, a 12-year low, from 88.6 the month before. New York Fed President John Williams said there is no need for urgency after the central bank's September meeting, and odds of an October rate hike fell to roughly a coin flip.

AI Headlines and What to Watch

A leaked Anthropic IPO prospectus, as reported, showed a valuation target above $2 trillion and $518 billion of planned compute and infrastructure obligations. Chicago Fed President Austan Goolsbee said expectations of AI productivity gains create a high danger of overheating now. Investors will watch for further signals on 2027 demand and for analyst follow-up on the optical-switching opportunity.