Coherent Stock Surges 435% in a Year as Nvidia-Backed AI Optics Expansion Tests Valuation Limits

Coherent Corp. (NYSE: COHR) has emerged as one of the biggest beneficiaries of the artificial intelligence infrastructure boom.

The optical networking and photonics specialist has become a critical supplier to the AI data center ecosystem, helping solve one of the industry’s biggest bottlenecks: moving massive amounts of data efficiently between increasingly powerful AI processors.

However, after a remarkable rally of more than 430% over the past year, investors are beginning to ask whether the company’s valuation already reflects much of the AI opportunity.

Recent price action suggests the market is reassessing that balance.

Coherent Pulls Back Despite Major CHIPS Act Win

Coherent shares closed at $378.85 on June 17, falling 1.03% after a sharp 6.2% decline the previous session.

The weakness came despite a significant positive catalyst.

The U.S. Commerce Department signed a letter of intent to provide up to $50 million in CHIPS Act funding for Coherent’s indium phosphide (InP) semiconductor facility in Sherman, Texas.

The expansion will:

• Double manufacturing space
• Increase wafer output fourfold
• Create more than 1,000 jobs
• Strengthen domestic AI infrastructure supply chains

The project has become strategically important because indium phosphide photonics are increasingly viewed as essential components in next-generation AI systems.

As GPU clusters grow larger, traditional copper interconnects become less efficient due to heat generation, power consumption, and bandwidth limitations.

Optical links built using InP technology offer a solution.

Nvidia Partnership Strengthens AI Positioning

The Sherman facility expansion is closely tied to Nvidia’s growing AI infrastructure ambitions.

Nvidia CEO Jensen Huang attended the groundbreaking ceremony and highlighted the importance of optical networking in scaling future AI systems.

The facility forms part of Nvidia’s broader $2 billion commitment to Coherent and optical networking infrastructure, reinforcing the long-standing relationship between the two companies.

The strategic rationale is straightforward:

• AI clusters continue expanding in size
• Data movement increasingly becomes the bottleneck
• Optical interconnects offer faster and more energy-efficient communication
• Coherent’s InP manufacturing provides a critical enabling technology

Coherent CEO Jim Anderson described photonic semiconductors as “essential building blocks of AI infrastructure,” a view increasingly shared across the semiconductor industry.

The investment also aligns with broader U.S. efforts to localize advanced semiconductor manufacturing.

Why Indium Phosphide Matters

Many investors focus exclusively on GPUs when discussing AI infrastructure.

The reality is more complex.

Modern AI systems require multiple supporting technologies:

• High-bandwidth memory
• Advanced packaging
• Networking equipment
• Optical interconnects
• Power management systems

Indium phosphide is particularly important because it enables lasers and optical components that transmit information using light instead of electrical signals.

As AI models grow larger and require thousands of GPUs working together, optical networking becomes increasingly critical.

This positions Coherent as a key participant in one of the fastest-growing segments of the AI supply chain.

COHR Technical Analysis: Consolidation Within a Powerful Uptrend

From a technical perspective, Coherent remains in a long-term bullish structure despite recent volatility.

The stock has entered a consolidation phase after an extraordinary rally that lifted shares more than fourfold over the past year.

Moving Average Structure Remains Bullish

The current setup tells an important story.

Coherent trades slightly below several short-term averages but remains comfortably above all major medium- and long-term moving averages.

This typically reflects consolidation rather than trend deterioration.

The stock remains:

• Roughly 8% above its 50-day EMA
• More than 23% above its 100-day EMA
• Over 50% above its 200-day EMA

Institutional trend support therefore remains intact.

RSI and MACD Signal Cooling Momentum

The oscillator picture is largely neutral.

RSI near 51 suggests neither overbought nor oversold conditions.

MACD remains on a sell signal, indicating that short-term momentum has weakened following the recent correction.

Meanwhile, ADX below 15 confirms a lack of strong directional trend.

This combination usually indicates a market that is digesting previous gains rather than beginning a major new move.

Key Support and Resistance Levels

Support

• $370-$375 (30-day EMA region)
• $350-$355 (50-day moving average cluster)
• $300-$310 (100-day EMA support)

Resistance

• $385-$390 (short-term moving average resistance)
• $400 psychological level
• $430-$450 prior rally zone

A sustained move above $400 would signal renewed bullish momentum, while a break below the $350 region could trigger a deeper consolidation.

Coherent’s Valuation Is Becoming the Central Debate

The challenge for investors is no longer identifying Coherent’s opportunity.

It is determining how much of that opportunity is already reflected in the stock price.

Several valuation metrics highlight this concern:

• Forward P/E near 48x
• Industry average near 22x
• Shares up approximately 435% over the past year
• Trading above many analyst price targets

Even bullish analysts acknowledge that future gains increasingly depend on execution rather than multiple expansion.

Investors will likely focus on:

• AI optics revenue growth
• Sherman facility ramp-up
• Margin expansion
• Supply chain stability
• Nvidia-related demand visibility

Supply Chain Risks Remain Underappreciated

One emerging concern involves indium phosphide supply.

China tightened export licensing requirements for InP materials in 2025, creating pressure across the optical semiconductor ecosystem.

Industry reports suggest prices for 6-inch InP wafers have risen sharply since those restrictions were implemented.

As a result, Coherent faces a delicate balancing act:

• Expand production rapidly
• Maintain margins
• Secure raw material supply
• Meet accelerating AI demand

Any disruption could affect profitability even if long-term demand remains robust.

Coherent Is One of the Purest AI Infrastructure Plays

Coherent occupies a unique position within the AI value chain.

Unlike GPU manufacturers competing directly with Nvidia, Coherent provides enabling technology required by virtually every large-scale AI deployment.

The investment case rests on several themes:

Bullish Factors

• Critical role in optical networking
• Deep Nvidia relationship
• CHIPS Act support
• Expanding U.S. manufacturing footprint
• AI infrastructure spending remains strong

Key Risks

• Premium valuation
• Supply chain constraints
• Execution risk during expansion
• Potential AI spending normalization
• Increased competition in photonics

The broader AI buildout remains in its early stages, and optical connectivity is likely to become more important as AI clusters scale.

For long-term investors, Coherent appears well-positioned to benefit from that trend. The question is no longer whether the company will participate in AI infrastructure growth, but whether future earnings can grow quickly enough to justify a stock that has already delivered one of the semiconductor sector’s most spectacular rallies.