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Furukawa Electric (5801.T) — chart, structure and Closelooknet read

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Signals for this name

Every Closelooknet reading that exists for 5801.T, from the same nightly bakes the boards use. Research diary readings, not advice.

Versus its index Rubin Build-Out 100 — the name, its sleeve and the index over day, week and month

Versus its index

The name against its Closelooknet index and its own sleeve — equal-weight, nightly closes.

Rubin Build-Out 100 · as of 2026-09-25

DayWeekMonth3 months
5801.T+0.5%+2.9%+5.5%−21.9%
High-Speed Interconnects+1.7%+3.5%+0.1%—
Rubin Build-Out 100+1.7%+5.0%+4.1%—

Against the index: 2.1 pts behind on the week, 1.4 pts ahead on the month; against its High-Speed Interconnects sleeve 5.4 pts ahead on the month.

Returns from the index workers’ nightly closes; equal-weight sleeves. A relative reading from the research diary, not advice.

Mentioned on Closelooknet 1 piece · newest: Daily Pulse, “Temperature 62 — semis re-lead, Interconnects +18% week” (2026-05-15)

Mentioned on Closelooknet

Where 5801.T appears in the diary — 1 piece, newest first. Every link is our own writing.

Dailies

Weather around the name 3 macro readings: Money Temperature, Factor regime, Sovereign pressure

The weather around this name

Macro readings that apply by membership — the regime, the factor tape, the sector cell, the funding backdrop.

  • Money Temperature Composite 62/100 · S&P 500 fund at 67, bullish alignedEight instruments scored on position, momentum, volume, volatility and fragility — the regime every name trades inside. Temperature lab → 2026-09-25
  • Factor regime Momentum leading — risk appetite buildingMomentum against low volatility (SPMO / SPLV): above its 50-day trend, 99th percentile of the window, +8.4% over 20 sessions. Factor regime → 2026-09-25
  • Sovereign pressure Index 0.61 · up 0.29 over 21 sessionsG7 long-end yields, 10s30s and the slope — the funding weather for every balance sheet on this site. Sovereign pressure → 2026-09-25
Who it is priced against Rubin Build-Out 100 · High-Speed Interconnects · 8 names with week and year-to-date

Peer group

Rubin Build-Out 100 · High-Speed Interconnects

Optical transceivers, switching silicon, networking IP. The fabric that turns isolated GPUs into clusters.

Compared against 5801.T on the nightly bakes; the Peers tab ranks the cohort on the Closelooknet scores where it exists.

Company snapshot — Furukawa Electric

5801.T in five paragraphs: what it makes and sells, where it sits in the Closelooknet stack, who it is priced against, why we track it, what we watch. Research diary, not advice.

What it does
Furukawa Electric is a Japanese manufacturer of optical fibre and cable, electronic wire and cable, and metal products, with a history stretching back well over a century. It supplies telecommunications and networking infrastructure, including the optical fibre used to link data centres and switches, alongside automotive and industrial wiring.
Where it sits in the stack
In our index, the Rubin Build-Out 100, Furukawa Electric sits in Layer 5, Connectivity & Materials, within the High-Speed Interconnects sleeve — the fabric that turns isolated GPUs into clusters. It supplies the optical fibre and cable that carry data between switches and servers, making it a constraint on how quickly that fabric can be strung together.
Who it is priced against
Closelooknet's peer group places it with the other High-Speed Interconnects names — Credo, Amphenol, Astera Labs, Lumentum, Marvell, MACOM, Nokia and Coherent — the fibre, transceiver and switching-silicon suppliers behind cluster networking; Corning is the wider market's usual comparison on the fibre side.
Why Closelooknet tracks it
It is a Rubin Build-Out 100 constituent, and the diary carries a Closelooknet score for it, though only one module is scored so far, so the read is still being built. It has appeared in the Midday 10 on a broad Asia-led move and in the Daily Pulse's Interconnects roundup.
What the diary watches
Whether demand for optical fibre and cable keeps climbing as networking layers scale to link larger GPU clusters, and whether that shows up as pressure on cable supply across the sleeve.

Furukawa Electric (5801.T) trades on the TSE exchange in Japan, and sits in Layer 5 of the build-out stack. Constituent of Rubin Build-Out 100.

Written from the company’s public profile and Closelooknet’s own readings, 2026-09-17. Descriptive, refreshed with the registry; corrections welcome via the imprint. closelook.net is an investment research diary — market structure, index membership and scores are our own readings, not investment advice. Related: index compare · sector dispersion · scanner.

FAQ · from the current data · as of 2026-09-26

Quick answers

What is Furukawa Electric (5801.T)?

Furukawa Electric trades as 5801.T on the TSE exchange (Japan) in the Closelooknet research universe, as of the registry build of 2026-09-26.

Is 5801.T in a Closelooknet index?

Yes — Furukawa Electric is a constituent of Rubin Build-Out 100, as of 2026-09-26.

Where does 5801.T trade against its moving averages?

Trending: Above its 50- and 200-day — still in an uptrend. As of 2026-09-25 — a technical state from the nightly Closelooknet bake, not advice. The Technical tab carries the full row.

How is 5801.T doing against its Closelooknet index?

Over the past month Furukawa Electric is +5.5% against +4.1% for the Rubin Build-Out 100 — 1.4 points ahead of its index, as of 2026-09-25. Its High-Speed Interconnects sleeve is +0.1% over the same month. The “Versus its index” table on this page carries the day, the week and the month for the name, its sleeve and the index.

Where has Closelooknet written about Furukawa Electric?

Furukawa Electric appears in 1 Closelooknet piece, most recently Daily Pulse: Temperature 62 — semis re-lead, Interconnects +18% week (2026-05-15). What Closelooknet said most recently: Names: AAOI, Furukawa (5801.T), Lumentum, Coherent, MACOM, Fabrinet, Marvell, Amphenol, Astera Labs, Credo. (Daily Pulse, 2026-05-15). The "Mentioned on Closelooknet" block on this page lists the long reads, the reference entries and the dailies that name it.

What does Furukawa Electric do?

Furukawa Electric is a Japanese manufacturer of optical fibre and cable, electronic wire and cable, and metal products, with a history stretching back well over a century. It supplies telecommunications and networking infrastructure, including the optical fibre used to link data centres and switches, alongside automotive and industrial wiring. Closelooknet's peer group places it with the other High-Speed Interconnects names — Credo, Amphenol, Astera Labs, Lumentum, Marvell, MACOM, Nokia and Coherent — the fibre, transceiver and switching-silicon suppliers behind cluster networking; Corning is the wider market's usual comparison on the fibre side.

Where does Furukawa Electric sit in the AI build-out?

In our index, the Rubin Build-Out 100, Furukawa Electric sits in Layer 5, Connectivity & Materials, within the High-Speed Interconnects sleeve — the fabric that turns isolated GPUs into clusters. It supplies the optical fibre and cable that carry data between switches and servers, making it a constraint on how quickly that fabric can be strung together. It is a Rubin Build-Out 100 constituent, and the diary carries a Closelooknet score for it, though only one module is scored so far, so the read is still being built. It has appeared in the Midday 10 on a broad Asia-led move and in the Daily Pulse's Interconnects roundup.

What does this page show?

A live price chart with SMA overlays and drawing tools for 5801.T, performance metrics, index-membership context and the Closelooknet structure read — an investment research diary view, not investment advice.

Related in the Closelooknet universe

same Closelooknet index seat first. Scored names rank on their Closelooknet score; names without one rank on trend state — above or below their 50- and 200-day averages — never on a score they do not carry.