Taiwan shares ended flat after a big swing
Taiwan’s Taiex ended nearly flat, down 25.75 points (0.06%) to 43,360.66 after a 1,000-point swing. Turnover was NT$1.036 trillion. TSMC fell 2.11% to NT$2,320, pressuring semiconductors. MediaTek and ASE also declined, while Nanya and Winbond jumped on a supply shortage. Foreign investors sold NT$5.73 billion net.
How this was made

The 30-second read
Why it matters
The day’s trading is characterized by TSMC-led semiconductor weakness, offset by rotation into non-chip AI-related names and a sharp memory supply-shortage bid. Foreign institutional selling and TWD/USD movement are highlighted as near-term barometers for follow-through.
Market read
Traders can use the reported rotation (out of TSMC into non-chip AI and memory shortage winners) plus the foreign flow and FX watchpoints to frame next-session positioning.
What to watch
The article cites technical resistance near the 20-day moving average and FX as a barometer, but it does not quantify how much of the foreign selling is persistent versus one-day rebalancing.
Background
Taiwan’s Taiex swung more than 1,000 points but finished nearly flat, with dealers citing selling that erased early gains.
Ticker impact
TSMC closed down 2.11% and its losses dragged the semiconductor subindex lower, shaping Taiex’s intraday reversal.
Bias to continued volatility/pressure while TSMC remains in consolidation and below the 20-day moving average resistance level.
The article directly links TSMC’s negative close to the semiconductor subindex decline and notes the Taiex failed to sustain gains due to large-cap semis.
MediaTek fell 1.15% to NT$3,865, contributing to the broader tech softness despite Nasdaq’s overnight rise.
Short-term downside bias unless rotation back into non-chip AI or broader semis offsets.
The piece provides a same-day price move but no new fundamental catalyst beyond index rotation and TSMC-led weakness.
Delta Electronics rose 2.53% to NT$1,620 as funds rotated out of TSMC into non-chip AI-related stocks.
Relative outperformance bias while rotation into power/AI-adjacent names continues.
The article links Delta’s strength to rotation flows but does not provide new Delta fundamentals.
Market effects
Semiconductor weakness (TSMC-led) is being partially offset by rotation into non-chip AI-related and memory supply-shortage trades.
Taiwan’s index direction is framed as sensitive to foreign institutional flows and FX moves (TWD vs USD) after yen support by the US and Japan.
US Nasdaq strength did not translate into sustained Taiwan gains, highlighting cross-market decoupling risk for global tech exposure.
Counterpoint
The Taiex’s flat close may reflect consolidation rather than a bearish trend, with rotation flows suggesting buyers are still active in specific pockets.
Key entities
- indexTaiwan Stock Exchange (Taiex)
Benchmark index that ended down 0.06% after a >1,000-point intraday swing.
- companyTSMC
Large-cap semiconductor stock whose decline dragged the semiconductor subindex and weighed on the Taiex.
- companyMediaTek
Smartphone IC designer that fell 1.15% during the session.
- companyASE Technology Holding
IC packaging and testing firm that dropped 4.10%.
- companyNanya Technology
Memory supplier that surged 10% on a global supply shortage narrative.




