SUMCO Shares Jump as Quarter-End Buying Lifts Battered Chip Stocks

Shares of SUMCO Corp. (3436.T) surged on Wednesday, driven by a wave of quarter-end buying into beaten-down semiconductor stocks and a more favorable macroeconomic backdrop. The stock closed up 7.2% at ¥3,259 in Tokyo trading.

Bargain Hunting and AI Optimism

The rally represented a significant reversal for the silicon wafer producer, which had seen its stock fall nearly 19% over the three months leading up to September 30. According to a report from Investing.com, investors engaged in bargain hunting, buying into the stock at its depressed levels.

This quarter-end positioning coincided with renewed optimism about long-term demand fueled by artificial intelligence. The semiconductor sector, including SUMCO, had previously been under pressure amid investor doubts over the sustainability of AI-driven growth.

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Favorable Macro Environment

Broader market conditions also provided a tailwind for technology and growth stocks. An overnight stall in the rally of U.S. Treasury yields eased pressure on equity valuations, as higher yields tend to make the future earnings of growth companies less attractive.

Furthermore, cooling investor bets on an October interest rate hike by the U.S. Federal Reserve helped improve market sentiment. This combination of factors contributed to a wider rally in Japanese technology shares, with the Nikkei 225 index gaining over 2% during the session.