C3.ai (NYSE:AI) is being compared with Lumentum on revenue paths, with C3.ai reporting sustained revenue declines while Lumentum follows a different trajectory in AI related markets. The contrast in revenue trends highlights differing momentum for the two companies within AI focused segments. C3.ai founder Thomas Siebel has returned as CEO and is aiming to steer the company through a potential turnaround in its AI software business. For a broader view on how different business models and...

LITE, ONTO and ASMB made it to the Zacks Rank #1 (Strong Buy) momentum stocks list on August 21st, 2026.

AI data centers need more than chips. Dell, Celestica, Lumentum and Vertiv are poised to benefit from surging demand for critical infrastructure.

Today, Aug. 20, 2026, disappointing consumer results and rising oil prices snapped Wednesday's relief rally, renewing inflation concerns across major indexes.

Dell, Celestica, Lumentum and Vertiv offer four ways to tap into AI data center growth across servers, networking, optics, power and cooling.

The market spent Tuesday worrying that AI demand will fade. Both companies had just reported the opposite.

Applied Optoelectronics and Lumentum both benefit from AI-driven optical networking demand, but the latter's stronger growth and rising estimates give it the edge.

Over eight quarters, Lumentum's revenue surged 66%, while C3.ai's plummeted 45% — a divergence that raises critical questions about their competitive positioning.

The manufacturer of optical and photonic components for AI reported a notable insider sale as shares have soared over the past year.

Earlier this week, reports that prices of indium phosphide substrates used in AI lasers may rise further amid supply tightness put fresh attention on AXT, which recently expanded its InP capacity and secured new supply agreements with Lumentum Holdings and Coherent Corp. The news highlights how AXT’s position in a constrained indium phosphide market could become increasingly important as AI-related demand strains global substrate supply chains. Now we’ll explore how tightening indium...

AI-driven optical connectivity demand accelerates shipments and margins to record levels.

A record-breaking quarter from Fabrinet sent its stock tumbling 20% and dragged the entire AI optical complex down with it, raising a question now rippling through Marvell, Coherent, and Amphenol shareholders: is this a one-day shakeout or a crack in the AI buildout thesis?

A risk-off wave is hammering optics stocks at midday Tuesday, and the triggers go well beyond anything that changed in the optics sector itself. Two separate headlines about AI spending have investors scrambling to reprice names that already carry enormous year-to-date gains.

LITE's 11.4X P/S signals a premium valuation, but AI-driven optics growth, rising margins and stronger FY27 estimates may support the case.

FEATURE Stocks were dropping Tuesday as artificial-intelligence infrastructure companies were under pressure. Optical network provider Coherent fell 6.4%. The stock surged 7.8% on Monday as the semiconductor index entered a new bull market.

Markets stumbled to start the week as oil surged, Iran rattled nerves, and bond yields hit levels not seen since 2007, leaving Wall Street analysts scrambling to reassess positions across retail, tech, and telecom ahead of Tuesday's open.

Small-cap stocks are finally recovering after years of underperforming the major indexes.

Coherent is the best-performing stock in the S&P 500 on Monday. Sandisk, Micron, Marvell, and other AI stocks also rise.

The next infrastructure wave may extend far beyond GPUs.

Lumentum Holdings has turned into a very strong performer over the past few years, yet its valuation checks are split, with the Discounted Cash Flow (DCF) estimate pointing to meaningful upside while market multiples paint a more demanding picture. After a very large three year return and sharp recent gains, the stock now sits at the center of a pricing debate rather than a clear bargain or clear bubble. Over the last three years, Lumentum Holdings has delivered a very large return, which...

Lumentum Holdings has significantly outperformed the broader market over the past year, and analysts are highly optimistic about the stock’s prospects.

A Taipei supply report on indium phosphide just sent shockwaves through the optics sector, and the institutional money that quietly positioned ahead of Monday's session suggests this squeeze may have much further to run.

Lumentum's fiscal Q4 earnings triggered a 5% selloff before a stunning reversal sent shares surging 14% the next day. Here is what the conference call revealed that completely flipped market sentiment and why analysts believe the biggest growth catalysts have not even arrived yet.