Stock Markets June 22, 2026 02:00 AM

Taiwan shares climb to new record as plastics, chemical and biotech stocks lead gains

Taiwan Weighted index up 1.28% at close with a mix of double-digit movers and sharp declines among select names

By Jordan Park
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Taiwan's benchmark index closed higher Monday, led by gains in the Plastic, Chemical and Biotech & Medical Care sectors. The Taiwan Weighted rose 1.28% to a fresh all-time high, while individual stocks showed wide dispersion with several names moving double digits in both directions. Commodity and currency markets registered mixed moves during the session.

Taiwan shares climb to new record as plastics, chemical and biotech stocks lead gains
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Key Points

  • Taiwan Weighted rose 1.28% to a new all-time high at the close, led by gains in Plastic, Chemical and Biotech & Medical Care sectors.
  • Top individual gainers included TW:6525 (+10.00%), TW:6405 (+10.00%) and TW:2472 (+9.99%); major decliners included TW:1423 (-11.69%), TW:1589 (-9.92%) and TW:3528 (-9.80%).
  • Commodities and currency moves were mixed: August crude fell to $75.32 a barrel, Brent to $78.69, gold futures rose to $4,212.15 an ounce, USD/TWD was 31.67, and US Dollar Index Futures rose to 100.71.

Taiwan equities closed higher on Monday, with strength concentrated in the Plastic, Chemical and Biotech & Medical Care sectors, lifting the Taiwan Weighted to a new record at the end of trading.

The Taiwan Weighted finished the session up 1.28%, marking an intraday move that carried the index to an all-time high by the close.

Leading the session's winners on the Taiwan Weighted were:

  • GEM Services Inc (TW:6525) - rose 10.00% or 13.00 points to close at 143.00.
  • Onano Industrial Corp (TW:6405) - gained 10.00% or 6.50 points to finish at 71.50.
  • Lelon Electronics Corp (TW:2472) - increased 9.99% or 36.50 points to end the day at 402.00.

On the downside, the heaviest declines included:

  • Reward Wool Industry Corp (TW:1423) - fell 11.69% or 5.25 points to close at 39.65.
  • Yeong Guan Energy Technology Group Co Ltd (TW:1589) - dropped 9.92% or 0.61 points to finish at 5.54.
  • Macnica Anstek Inc (TW:3528) - declined 9.80% or 12.00 points to end at 110.50.

Market breadth figures recorded during the session showed the unusual note that "Falling stocks outnumbered advancing ones on the Taiwan Stock Exchange by 0 to 0."

There were notable record moves among individual names. Shares of GEM Services Inc (TW:6525) climbed to an all-time high, advancing 10.00% or 13.00 to 143.00. Lelon Electronics Corp (TW:2472) also rose to an all-time high, gaining 9.99% or 36.50 to 402.00. By contrast, Yeong Guan Energy Technology Group Co Ltd (TW:1589) fell to an all-time low, declining 9.92% or 0.61 to 5.54.

Commodities moved unevenly during the session. Crude oil for August delivery was down 0.70% or 0.53, trading at $75.32 a barrel. Brent oil for September delivery fell 1.70% or 1.36 to $78.69 a barrel. The August Gold Futures contract rose 0.94% or 39.25 to trade at $4,212.15 a troy ounce.

DX+0.06%GC+0.95%LCO-1.8%CL-0.75%TWII+1.28%1423-11.69%1589-9.92%2472+9.99%6405+10.00%6525+10.00%3528-9.8%

Currency moves recorded alongside the local equity session included USD/TWD declining 0.07% to 31.67, while TWD/CNY was unchanged at 0.21 with a 0.28% figure shown. The US Dollar Index Futures was reported up 0.09% at 100.71.

The session also included an investor-facing valuation reference that highlighted the ticker 1423 for further fair value analysis, noting a mix of industry valuation models available to assess whether it may present an opportunity. The commentary directed readers to additional tools for valuation but did not alter the market facts recorded above.

Overall, the trading day featured a clear index-level gain driven by specific sector strength, while individual stocks displayed substantial volatility in both directions.

Risks

  • Significant single-stock volatility - several names experienced double-digit moves, posing risk to portfolios concentrated in those equities, particularly in the plastics, chemicals, and biotech & medical care sectors.
  • Commodity price swings - declines in crude and Brent oil alongside a rise in gold may influence energy-linked and commodity-sensitive firms within the market.
  • Currency fluctuations - movements in USD/TWD and the US Dollar Index Futures could affect exporters and companies with foreign-currency exposure listed on the Taiwan Stock Exchange.

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