Fujikura’s Volatility Spike: Tokyo Bourse Widens Trading Band as European Shares Plunge 13%

Fujikura shares tumble 13% in Europe after hitting daily limit in Tokyo, fueled by upgraded outlook from AI data center demand; annualized volatility above 160%.

The same stock that hit its daily limit in Tokyo on Monday saw European investors race for the exits on Tuesday. Fujikura’s shares tumbled more than 13% to €34.00 in European trading, wiping out a chunk of the gains that had driven the Japanese cable maker to a Monday close of €39.20 – equivalent to 6,161 yen, the upper limit on the Tokyo Stock Exchange. In response to the relentless buying pressure, the exchange expanded Fujikura’s daily trading range to 10,165 yen from the previous level, effectively giving the stock room to sustain its rally. The split-screen action underscores the extreme volatility gripping the name: annualized 30-day volatility stands at over 163% in Europe and 160.87% in Tokyo, while the relative strength index sits at 65.7, edging toward overbought territory.

The catalyst for the frenzy is a sweeping upgrade in Fujikura’s outlook, released on 18 June. For the fiscal year ending March 2027, management now forecasts revenue of 1.462 trillion yen, up from a prior estimate of 1.243 trillion yen, and operating profit of 310 billion yen, versus 211 billion yen earlier. The half-year picture through September 2026 is similarly bright: revenue of 778 billion yen and operating profit of 174 billion yen, compared with earlier projections of 594 billion yen and 92 billion yen, respectively. The company attributed the boost to unexpected project orders from hyperscalers for fiber-optic components, higher selling prices, and a smaller-than-expected impact from hydrogen supply constraints.

These tailwinds tie Fujikura’s fortunes directly to the build-out of AI data centers and high-speed networks. The Japanese government is amplifying that theme with a planned 2.3 trillion US-dollar investment in strategic sectors by 2040, much of it targeting physical AI infrastructure and semiconductor supply chains. Investors have piled into Fujikura as a primary beneficiary, driving the stock up 56.64% in the past seven trading days in Tokyo (some European calculations put the seven-day gain at around 36%). On a monthly basis, the advance stands at 23.64%.

Yet the rally had pushed valuations into rarefied air even before Tuesday’s reversal. The sell-off in Europe coincided with the scheduled release of Fujikura’s securities report for the fiscal year 2026. A shareholder meeting is set for 26 June, followed by a dividend payment on 29 June. With the stock price so sensitive to every new data point, many investors opted to lock in profits ahead of these events. The dip does not alter the underlying fundamentals: the fiscal year through March 2026 already delivered revenue growth of 20.7%, operating profit growth of 39.2%, and net profit growth of 72.5%, with an operating margin of 16%.

The company is also laying the groundwork for future capacity. Fujikura plans to build a new plant at its Sakura Works site, with an investment of around 40 billion yen, to strengthen production for AI infrastructure serving the US market. In parallel, it is establishing a US subsidiary, Fujikura Optical Cable Systems LLC, in Delaware, with operations slated to start in June 2026. These moves signal confidence that demand from hyperscalers will remain robust, even as the market questions whether the latest outlook already prices in all the good news.

Tuesday’s activity in Tokyo told a different story from the European retreat. While the Nikkei 225 shed over 1,700 points intraday, Fujikura held onto its recent gains, thanks in part to the widened trading limit. Analysts at FISCO now watch the May high of 7,933 yen. If the stock breaks above that level, they expect further short-covering to fuel additional upside. For now, the path forward hinges on whether Fujikura can deliver concrete execution details at Thursday’s shareholder meeting – and whether the volatility that has made it one of the market’s most extreme plays will settle or accelerate.