AI Datacenter Power Grid Expansion: High-Voltage Cable Supply Chains and Global Backlogs

The Common Dilemma: “Is It a Top, or Why Are Foreign Institutions Aggressively Buying?”

This week across Asian equity markets, power grid and cable infrastructure manufacturers—spearheaded by Gaon Cable (000500.KS)—witnessed massive foreign net inflows and explosive price momentum. For global and retail investors watching the rally, two central questions emerge:

“Are we buying at the cyclical peak?” versus
“What structural fundamentals are driving tier-1 foreign funds to accumulate Korean cable manufacturers?”

Is this merely speculative momentum, or a secular multi-year supercycle fueled by AI data centers and grid modernization? Let us analyze the audit-backed facts via financial filings (DART) and global power infrastructure supply chain dynamics.

The Three Stages of the AI Power Infrastructure Bottleneck

• Stage 1 (Transformer Squeeze): In the initial phase of AI data center buildouts, high-voltage transformers experienced backlog lead times stretching 4 to 5 years, driving multi-bagger stock rallies.
• Stage 2 (Cable & Grid Vascular Bottleneck): Even when a substation transformer is installed, power cannot reach hyperscale server racks without medium/low-voltage (MV/LV) distribution lines and extra-high-voltage (EHV) underground cables. The industry has officially entered this severe cable shortage phase.

DART Financial Filings: Cable Pure-Plays vs. Supply Chain Analysis

Based on audited financial statements from the Financial Supervisory Service (DART), here is a side-by-side comparison of leading Korean cable manufacturers powering North American and European grid expansions:

4 Structural Drivers Behind Foreign Institutional Inflows

1. The Cost-Plus Escalation Moat (Copper Pass-Through Pricing)

Copper represents 60%–70% of total manufacturing costs in cable production. Unlike consumer goods facing margin compression during commodity rallies, industrial cable contracts incorporate standard raw material escalation clauses (Cost-Plus pricing):

• Any increase in London Metal Exchange (LME) copper prices is immediately passed through to end-utility billing rates.
• Furthermore, inventory purchased at prior lower copper prices generates substantial inventory revaluation spreads, driving temporary margin surges.

2. North America’s 30-Year Grid Replacement Supercycle

According to the US Department of Energy (DOE), more than 70% of the United States power transmission and distribution lines are over 25 to 30 years old. Backed by federal funding programs such as the Infrastructure Investment and Jobs Act (IIJA) and IRA clean energy connectivity incentives, North American utilities are awarding multi-year replacement contracts to certified Asian manufacturers.

3. Gaon Cable’s Transformation into a Global Export Engine

As a core affiliate of the LS Group—one of the world’s leading cable conglomerates—Gaon Cable is leveraging group-wide global sales networks to supply medium-voltage distribution infrastructure for US hyperscale data centers. This shifts the company’s profile from a domestic-oriented utility vendor into a high-margin global exporter.

4. Compelling Valuation Arbitrage vs. Western Peers

Western industry leaders like Prysmian S.p.A. (BIT: PRY, Italy) and Nexans S.A. (EPA: NEX, France) trade at price-to-earnings (P/E) multiples between 20x and 26x. In contrast, Korean cable pure-plays trade at a steep Korea Discount of 8x to 12x P/E, offering international asset allocators an attractive valuation discount with equivalent secular growth exposure.

Investor Playbook: Key Risk Factors & Actionable Strategy

1. Short-Term Technical Overextension (RSI Above 70):
   • Following rapid multi-session rallies, price-to-20DMA spreads have widened significantly. Rather than chasing momentum, scale in during technical pullbacks around key moving-average supports.
2. Commodity Price Volatility:
   • Short-term copper price corrections can temporarily soften sentiment across the sector.
3. Backlog Duration & Margin Quality:
   • Inspect quarterly DART contract disclosures to distinguish between low-margin legacy supplies and high-margin North American utility agreements.

Global Investor Playbook & Ticker Guide

For international portfolio managers and individual investors accessing the Korean market:

1. Brokerage Access & Ticker Symbols

• Interactive Brokers (IBKR), Charles Schwab, Fidelity: Accessible under the Korea Exchange (KRX) market access codes.
  • Gaon Cable: 000500.KS (Reuters / Bloomberg: 000500 KS Equity)
  • LS Eco Energy: 229640.KQ (Reuters / Bloomberg: 229640 KQ Equity)
  • Taihan Cable & Solution: 001440.KS (Reuters / Bloomberg: 001440 KS Equity)
  • Iljin Electric: 103140.KS (Reuters / Bloomberg: 103140 KS Equity)

2. Tax Treaty & Withholding Considerations

• Dividend withholding tax for US/EU residents investing in Korean equities is governed by bilateral double-taxation treaties (typically capped at 10%–16.5% under W-8BEN / bilateral treaty filings).
• No local capital gains tax is levied on non-resident foreign investors trading via recognized omnibus institutional accounts or major global brokers under standard ownership thresholds (< 25%).