Marvell's Blowout Earnings Just Confirmed the Optical Interconnect Supercycle & the Best AI Stocks to Watch May Not Be Who You Think

Marvell Technology (NASDAQ: MRVL) reported Q4 FY2026 earnings after the close Thursday, and MRVL earnings came in ahead of estimates across every metric that matters: revenue, EPS, gross margin, and — most importantly — forward guidance. The company issued a $2.4 billion Q1 revenue guide that crushed Street estimates by more than $100 million, capped a full fiscal year of 42% revenue growth, and delivered a CEO who told analysts on the call that year-over-year growth will accelerate every single quarter in FY2027.

That is not a soft beat. That is a structural signal — and for investors hunting AI stocks to buy in 2026, it is one of the clearest macro confirmations the semiconductor sector has produced in years.

Read More: AI Data Center Photonics: Why Light Is Replacing Copper

AVGO stock kicked things off the night before. Broadcom (NASDAQ: AVGO) reported its own blowout quarter, and AVGO earnings reinforced the same thesis: hyperscaler AI infrastructure spending is not slowing, it is compounding. Back-to-back beats from the two most important data center semiconductor stocks on the calendar in the same week is not a coincidence. It is confirmation. Amazon (NASDAQ: AMZN), Microsoft (NASDAQ: MSFT), Alphabet (NASDAQ: GOOGL), and Meta (NASDAQ: META) have collectively raised their 2026 capital expenditure forecasts to an estimated $645 billion to $650 billion. That money flows directly into the GPU clusters, custom AI silicon, optical networking, and interconnect infrastructure that semiconductor stocks like MRVL and AVGO are built to serve.

Among AI stocks to watch right now, the question is no longer whether the supercycle is real. MRVL earnings settled that. The question is who else wins.

Why MRVL Earnings Matter Beyond MRVL Stock

MRVL stock has been under pressure — down roughly 15% over the past year heading into tonight's print — which made the setup unusually attractive for patient investors. The stock entered earnings in oversold territory while the underlying business was executing at record levels. That disconnect between MRVL stock price and MRVL earnings fundamentals is exactly the kind of setup that generates outsized post-earnings moves in semiconductor stocks.

The numbers: Q4 revenue of $2.219 billion beat estimates, non-GAAP EPS of $0.80 beat the $0.79 consensus, and full-year revenue of $8.195 billion set a company record. Non-GAAP EPS for the full year hit $2.84, up 81% year-over-year. CEO Matt Murphy reported that design wins in fiscal 2026 hit an all-time record and that bookings are growing at a record pace.

The Q1 FY2027 guide of $2.4 billion versus the $2.28 billion consensus is what sent MRVL stock up roughly 8% after hours. The Street had modeled approximately $10 billion in FY2027 revenue. If growth accelerates each quarter from a $2.4 billion Q1 base, that figure looks meaningfully conservative.

For anyone tracking data center stocks, the embedded optical DSP demand figure is the number that matters most for the broader trade. Marvell is one of the world's leading suppliers of optical digital signal processors — chips that convert electrical signals to light for high-speed fiber transmission inside AI data centers. When MRVL guides $2.4 billion with optical driving a significant portion of data center revenue, it is signaling that hyperscalers are committing to a massive optical wiring upgrade that cascades through every layer of the AI infrastructure supply chain.

That cascade is where the best AI stocks to buy in 2026 may be hiding.

The AI Data Center Stack — And Where the Real Leverage Hides

Think of AI infrastructure stocks as a layered ecosystem. NVDA stock — Nvidia (NASDAQ: NVDA) — sits at the top with the GPUs and AI accelerators, the processing brains of every major AI cluster being built today. MRVL stock and AVGO stock sit in the middle, supplying the custom silicon, optical DSPs, and switching fabric that connects those GPUs and servers into functioning AI systems. These are the picks-and-shovels semiconductor stocks that made early investors rich as the AI buildout scaled.

Below all of them sits a component layer that most investors tracking AI stocks have never encountered: the optical engine and photonic subassembly suppliers who manufacture the actual physical building blocks that make high-speed optical transmission possible at scale.

This is where the highest optionality in AI stocks to watch right now may be concentrated.

When MRVL discusses optical DSP demand, it describes aggregate bandwidth commitments from the world's largest cloud customers. Those commitments translate into tens of millions of optical links annually. Each link requires optical engines, transceivers, light sources, and photonic integration modules. The optical transceiver market for AI clusters and hyperscale networks is already forecast by LightCounting to double from $5 billion in 2024 to $10 billion in 2026. MRVL's guidance implies that estimate may itself be conservative.

Larger optical names like Coherent (NASDAQ: COHR), Lumentum (NASDAQ: LITE), and Macom Technology Solutions (NASDAQ: MTSI) offer established exposure to optical infrastructure. COHR stock and LITE stock are the most widely followed photonics plays in the sector. Networking infrastructure stocks like Arista Networks (NASDAQ: ANET) benefit from the same hyperscaler capex wave. Equipment suppliers like Applied Materials (NASDAQ: AMAT) and foundry names like TSMC (NYSE: TSM) sit further upstream.

But there is also a nano-cap tier of this supply chain that captures essentially none of the attention paid to MRVL stock, AVGO stock, or NVDA stock — and potentially some of the most asymmetric upside available in AI stocks today.

Enter POET Stock: The Optical Interposer Pure-Play

POET Technologies (NASDAQ: POET) is one of the least-covered AI stocks on the market and one of the most directly exposed to the exact demand signal MRVL earnings just confirmed.

POET stock represents a company building optical engines and integrated photonic subassemblies on a patented platform called the POET Optical Interposer™. The Interposer integrates electronic and photonic components — lasers, modulators, detectors, and silicon electronics — onto a single chip using wafer-level semiconductor manufacturing. The result is an efficient optical engine compared to traditional approaches.

If NVDA stock is the brain of the AI buildout, MRVL stock is the nervous system, and POET stock is the synapse.

Watch Now: POET Ready for ‘Strong Revenue Ramp’ as Product Orders Arrive

The company is in active commercial ramp. In Q3 2025, POET secured two successive initial production orders from key customers totaling over $5.6 million. In October 2025, POET received a production order exceeding $5 million for 800G optical engines from a leading systems integrator building optical transceiver modules for hyperscale data centers — engines scheduled to ship in the second half of 2026, precisely when MRVL's guided acceleration hits. POET also introduced an optical receiver developed in collaboration with Semtech (NASDAQ: SMTC), targeting the highest-performance tier of the AI interconnect market — the same bandwidth tier MRVL called out on its earnings call tonight as the primary demand driver.

Among under-the-radar AI stocks to watch, POET's manufacturing buildout deserves attention. The company operates a 10,000 square foot cleanroom in Malaysia through Globetronics, targeting production capacity of over one million optical engines annually by 2026. Strategic partnerships with Foxconn Interconnect Technology, Luxshare, and Mitsubishi Electric provide volume manufacturing capability and direct channels into hyperscale data center supply chains. In January 2026, POET raised $150 million in a registered direct offering, giving the company a capitalized, no significant debt balance sheet heading into its commercial ramp. POET has also earned seven major industry awards in the past 15 months, including the 2025 ECOC Award for Most Innovative Chip-scale Packaging/Optical Sub Assembly Product.

For investors comparing photonics stocks, POET stock sits at an unusual intersection: patented technology, product alignment, Foxconn-backed manufacturing, and a market capitalization that has not yet reflected what MRVL earnings just confirmed about the size of the addressable market.

The Math: What Small Share Gains Mean for a Nano-Cap AI Stock

This is where the optionality calculus on POET stock gets interesting relative to larger semiconductor stocks and AI stocks.

LightCounting forecasts the optical transceiver market for AI clusters at $10 billion by 2026. That market covers optical engines, modules, and components of exactly the type POET manufactures.

POET's first major production order alone — the $5 million 800G order received in October 2025 — was a meaningful multiple of its entire prior revenue history. Among small-cap AI stocks and nano-cap photonics plays, that kind of commercial validation from a Tier 1 systems integrator is a significant credibility milestone.

For investors comparing POET stock to larger data center stocks and optical infrastructure names, the risk-adjusted framing is straightforward: MRVL stock, AVGO stock, and LITE stock offer lower-risk exposure to the same secular trend with established revenue bases. POET stock offers higher-risk, potentially higher-reward exposure at a market cap where a handful of design wins could move the needle dramatically.

The Bull Case for POET Stock

The strongest bull argument for POET stock starts with what MRVL earnings just provided and works backward. Hyperscaler capex of $645–650 billion in 2026 means optical interconnect spending is not optional — it is baked into infrastructure roadmaps at the world's largest companies. MRVL's "accelerating every quarter in FY2027" guidance and record design win backlog could suggest the demand is funded and real.

Against that backdrop, POET stock is commercializing optical engines at exactly the moment the market is transitioning to those speed tiers. The Foxconn and Luxshare partnerships provide volume manufacturing credibility that most nano-cap AI stocks cannot claim. The $150 million raise removes near-term capital risk. The Semtech collaboration on a receiver technology positions POET in one of the potentially highest-demand segments of the optical product stack.

M&A optionality adds another dimension. Larger optical and semiconductor companies including AVGO, COHR, LITE, and MTSI have acquired photonics capabilities before. Among AI stocks to watch for potential consolidation, a company that has qualified optical engines with hyperscaler supply chains and holds patented Interposer technology becomes a strategic asset in a market where scale matters enormously.

The Bear Case

The bear case on POET stock is equally clear and cannot be minimized.

POET is pre-scale in a way that separates it from every other AI stock discussed in this article. Q3 2025 revenue was approximately $298,000. The company is burning cash and reporting net losses. The path from initial production orders to recurring hyperscaler revenue is long and technically demanding. Yield problems, qualification delays, or architectural changes by hyperscaler customers could materially delay the commercial ramp.

Competition across the photonics stocks universe is intense. COHR stock, LITE stock, and international optical component manufacturers have far greater resources, established customer relationships, and the ability to bundle solutions. Larger players can absorb margin pressure that would be existential for a nano-cap AI stock.

Multiple capital raises in recent history reflect the cash demands of scaling photonics manufacturing. Future dilution remains a real risk for POET stock holders.

Investors comparing semiconductor stocks and AI stocks should weight this risk appropriately. POET stock is not a replacement for MRVL stock or AVGO stock in a portfolio — it is a different risk profile entirely.

Stocks to Watch: What the MRVL Earnings Read-Through Means for the Sector

For investors building an AI stocks watchlist after tonight's MRVL earnings, the sector read-through is broadly positive for every name in the optical interconnect and data center stack.

MRVL stock — the primary beneficiary of its own results. Watch Q1 FY2027 execution and whether Murphy's "accelerating every quarter" commitment holds.

AVGO stock — already confirmed its own strength the prior night. AVGO earnings plus MRVL earnings in the same week is the strongest possible validation of the custom silicon and optical networking trade.

NVDA stock — the anchor of every AI stocks portfolio. MRVL's record design win backlog and accelerating guide are indirect confirmation that GPU cluster builds are scaling, which is the primary demand driver for NVDA stock.

ANET stock — Arista Networks is the most direct networking infrastructure beneficiary after MRVL and AVGO. Data center stocks like ANET move on the same hyperscaler capex signals.

COHR stock / LITE stock — the established photonics stocks. Both benefit from the optical upgrade cycle MRVL just confirmed.

CRDO stock — Credo Technology (NASDAQ: CRDO) is another under-the-radar AI stock in the high-speed connectivity space that deserves a spot on any semiconductor stocks watchlist after tonight.

POET stock — the highest-risk, highest-optionality name in the optical interconnect stack. Not for everyone. For the right investor, potentially the most interesting AI stock to watch in 2026.

Bottom Line: The Best AI Stocks to Watch After MRVL Earnings

Marvell's $2.4 billion Q1 guide and Broadcom's concurrent beat removed the last credible argument that AI data center spending was approaching a ceiling. The optical interconnect supercycle is no longer a thesis — it is reflected in the guidance packages of two of the largest semiconductor stocks in the world, issued in the same 48-hour window.

The obvious trade is owning MRVL stock, AVGO stock, and NVDA stock for direct exposure to the primary beneficiaries. Among the best AI stocks to watch for diversified exposure, ANET stock, COHR stock, LITE stock, and CRDO stock round out a picks-and-shovels approach to the same secular theme.

The less obvious trade — the one that most investors scrolling through AI stocks right now will miss — is looking down the supply chain at component-level photonics stocks where the market cap is small enough that even fractional share gains in a $10 billion and growing market produce transformational outcomes.

POET stock is that trade at maximum optionality. Patented Interposer technology. The product alignment with the exact demand MRVL just guided. Foxconn and Luxshare manufacturing partnerships. A freshly capitalized balance sheet. A market cap that has not yet priced in what tonight's MRVL earnings confirmed about the size and durability of the opportunity.

The data center is getting wired for the AI age. The only question is who makes the wire — and whether you find them before Wall Street does.

Tickers mentioned: MRVL, NVDA, AVGO, POET, ANET, COHR, LITE, MTSI, SMTC, CRDO, AMZN, MSFT, GOOGL, META, TSM, AMAT