Shanghai, Jan 25, 2026, 09:53 CST — Market closed.
- Suzhou TFC Optical Communication Class A shares ended at 189.16 yuan, slipping 5.4%.
- Margin financing remained heavy in the stock following a sharp rise the previous day.
- A broker note highlighted tightness in upstream parts and FX swings as key near-term drivers.
Suzhou TFC Optical Communication Co., Ltd. Class A shares (300394.SZ) closed Friday down 5.4% at 189.16 yuan. The stock remains on watchlists as Monday’s reopen approaches. 1
The move stood out, defying the broader trend: China’s ChiNext Index, home to many tech-linked stocks, gained 0.63% on Friday. Optical communications shares have seen swings this month as investors weigh the next phase of AI data-centre spending and the hardware essential for data transfer. 2
Leverage is in play. On Jan. 22, margin trading data revealed net financing purchases of 2.04 billion yuan in Suzhou TFC, pushing the stock’s financing balance to 55.15 billion yuan — surpassing the 90th percentile of its past year’s range, according to Sina data. Margin trading allows investors to borrow funds to buy shares, magnifying both upward moves and sharp declines. 3
On Jan. 24, Zhongyuan Securities analyst Li Luyi flagged short-term pressure from upstream materials and currency swings in a note featured by Hexun. He highlighted a tight supply of “upstream EML optical chips,” warning this squeeze might throw off the shipping schedule for 800G and 1.6T optical engines — the tech handling data rates of 800 gigabits and 1.6 terabits per second. 4
The company’s latest major update came earlier this week. In a Jan. 21 filing, Suzhou TFC projected net profit attributable to shareholders for 2025 between 1.88 billion and 2.15 billion yuan, marking a 40% to 60% rise from the previous year. The growth is driven by strong demand for high-speed optical devices and cost-cutting measures. However, the company also noted foreign-exchange losses weighing on financial costs. The forecast is based on preliminary figures and hasn’t been audited. 5
The profit-preview cycle has dragged other optical communications stocks into the mix. Chinese media spotlighted peers like Shanghai-listed Cambridge Technology and Suzhou TFC as contenders for the next “1.6T” market, though they cautioned that a tight supply of critical optical chips could still choke off deliveries. 6
Suzhou TFC, located in Suzhou, produces optical passive components and precision parts for optical communications equipment, according to Sina Finance data. Optical communication components made up roughly 98.9% of its revenue in the most recent report. 7
Friday’s action showed the broader market holding firm: the Shenzhen Component Index gained 0.79%. That made the decline in Suzhou TFC feel more like a case of isolated stock risk rather than a widespread selloff. 8
Investors keep circling back to one risk: if demand growth slows or supply chain bottlenecks linger, margins could shrink sharply — and leveraged positions might unwind just as fast.
The next key date is April 23, when Investing.com schedules the company’s upcoming earnings release. Until then, traders will eye Monday’s open, looking for clues that the margin-driven turnover is slowing down, plus any new filings offering more detail beyond the profit outlook. 9
