On June 5, Tianyu Advanced (02631.HK) fell 5.1% in regular trading to HKD 99.45, with turnover of HKD 217 million.

On the news front, the semiconductor sector weakened broadly, with major peers including ASMPT down 3.97%, GCL Technology down 2.63%, and Epiworld down 2.04%, demonstrating significant sector-wide selling pressure. Market concerns over continued price erosion for 8-inch silicon carbide substrates persisted, while the previously disclosed reduction by a shareholder holding over 5% — from 8.00% to 6.83% — remained undigested. Following a rebound earlier this week driven by a broker initiation with a Buy rating and Morgan Stanley accumulation, profit-taking resumed as short-term gains were locked in.

As the global leader with 51.3% market share in 8-inch SiC substrates, Tianyu Advanced has faced compounding headwinds since late May, including National IC Fund reductions across semiconductor names and the stock being removed from the STAR 50 Index effective June 12, adding passive fund outflow risk.

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