Taiwan's Nan Ya Plastics jumped sharply on heavy volume after local investment funds bought the stock for nine straight days, good news for shareholders betting on its push into high-end electronics materials.

• The stock closed up about 5% on very heavy trading, its biggest move in a while.
• Funds are buying because Nan Ya is teaming up with Japan's Nittobo to make advanced glass-fiber materials used in AI server circuit boards.
• Orders for its top-grade copper-clad laminate (M7, M8) are expected to ramp up in the fourth quarter, lifting sales and profit margins.
• Nan Ya has upgraded and expanded its laminate plants and is installing new glass-fiber looms, with new capacity kicking in from late this year into next year.
• Foreign investors have been selling for five days, so the rally is being driven by domestic funds alone.

Outlook: If foreign investors turn back to buying, the stock could retest its previous high, about 6% above current levels.