What's Happening

The AI server/interconnect investment landscape has bifurcated sharply over the past 90 days. Optical leaders have already captured their largest moves — AAOI surged from ~$48 to ~$149 (+211%) and LITE from ~$577 to ~$904 (+57%) over the same window, leaving little "gradual uptrend" thesis remaining. Meanwhile, several power-delivery, connector, and retimer names have been moving in a more measured cadence — or pulling back outright — even as their fundamental underpinnings accelerate.

NVT: The Clearest Gradual Follower

nVent Electric posted a historically strong Q1 2026: record sales of $1.242B (+53% YoY, +34% organic), adjusted EPS of $1.09 versus $0.64 consensus — a 70% beat — and a backlog that tripled year-over-year to $2.6B. The company raised full-year 2026 EPS guidance to $4.45–$4.55 on $4.9–$5.0B revenue. Data center infrastructure (liquid cooling, enclosures, power management) now represents over 55% of total sales, up from 12% at spin-off, with that segment growing 80%+ organically in Q1.

The price response has been sustained but not parabolic: NVT moved from $114.62 to $169.95 over 90 days (+48.3%), including a 30-day surge of +32.1% following earnings. After the blowout Q1 report, at least six Wall Street firms raised price targets, with RBC lifting to $180, UBS to $200, and Roth Capital to $185, all citing AI data center demand and backlog momentum. At ~$170, consensus post-earnings PT range of $180–$200 implies 6–18% further upside. Forward P/E of ~37x is premium but grounded in 21–23% organic growth guidance — well below the multiples commanded by optical blowoff peers.

CRDO: Parabolic but Thesis Intact

Credo Technology has delivered the group's strongest 90-day move (+53%, from $123 to $188), yet the fundamental thesis continues to expand rather than exhaust. Q3 FY26 revenue came in at $407M (+201% YoY) with non-GAAP gross margins of 68.5%, and Q4 guidance of $335–$345M implies the company remains on track for >170% full-year FY26 growth exceeding $1.3B.

On the product side, Credo's Toucan PCIe retimer achieved PCI-SIG compliance at 32.0 GT/s for PCIe 6.0 in February 2026, and the Blue Heron 224G AI scale-up retimer launched targeting UALink, ESUN, and Ethernet protocols on a 3nm process. The company confirmed PCIe Gen 5 and Gen 6 retimer design wins across five hyperscaler AEC customers, each representing >10% of revenue. The PCIe retimer market is projected to reach $2.8B by 2033 at an 11.5% CAGR, while CRDO's scale-up networking TAM could top $40B by 2030.

The $750M DustPhotonics acquisition adds silicon photonics PIC capability in-house, with optical revenues expected to exceed $500M in fiscal 2027; Needham maintained its Buy/$220 PT post-announcement. Consensus PT of ~$208 implies ~10% further upside from current $188 — modest, but the DustPhotonics optionality is not yet in most models.

APH: Pulled Back, Fundamentals Unbroken

Amphenol is the outlier in this set: the stock has declined 11.2% over 90 days (from $144 to $128) even as its fundamental metrics hit records. Q1 2026 saw sales of $7.62B (+58% YoY, +33% organic), adjusted EPS of $1.06 (+68% YoY), and a book-to-bill of 1.24x — indicating orders outpacing shipments. IT datacom (primarily AI-driven) accounted for 41% of revenue, up 99% YoY.

The January 2026 acquisition of CommScope's CCS business for ~$14.8B materially expanded APH's fiber optic interconnect and data center penetration; CCS is expected to contribute $4.1B in FY2026 sales and $0.15 EPS accretion. 23 Wall Street analysts cover APH with a median price target of $169 (range $135–$210), with an overall Strong Buy consensus, implying ~32% upside from $128 — well above the 15% hurdle set in the hypothesis screen.

Exclusions and Why

DELL is a confirmed blown-off name: the stock surged from $121 to $260 (+115%) over 90 days. Goldman Sachs raised its Dell price target to $215 with a Buy rating in April 2026, but at $260, the stock has already blown through most targets. Dell's Q4 FY26 AI server revenue surged 342% YoY, and the CFO confirmed the pipeline 'has never been higher', but the upside cadence is no longer "gradual."

SMCI remains structurally impaired. The stock is up only 5.5% over 90 days, but that masks a trough of $23.22 in late March before a partial recovery. Gross margins collapsed to 6.4% in Q2 FY26 (vs. historical 14–17% targets), and FY26 full-year guidance remains single-digit. SMCI also faces a federal export-control overhang following U.S. charges for allegedly smuggling AI technology to China, adding legal risk to an already-compressed margin structure.

ALAB is high-quality but recently re-rated: Astera Labs reported Q1 2026 revenue of $308M (+93% YoY) with Q2 guidance of $355–$365M, but the stock's 90-day path (peak $188 → trough $100 → back to $200) reflects a sharp post-earnings re-rating rather than gradual accumulation. Forward P/E of ~67x and P/S of ~22x leave limited cushion if execution falters.

Bottom Line

NVT, CRDO, and APH are the three names in the AI server/interconnect sub-layer where the combination of confirmed hyperscaler/platform catalysts, sustained (not single-day) price moves, and intact sell-side PT upside remains most coherent. NVT is the cleanest gradual-uptrend story with the largest backlog acceleration; CRDO has the strongest revenue growth momentum and optical expansion optionality; APH offers the most PT upside from a position of fundamental strength and post-acquisition scope.