81% of Retail Investors Lose Money on AI Stocks: Understand the TWSE Underlying Logic in 30 Minutes
You open your phone and see your AI stocks are down again, with paper losses exceeding NT$100,000. According to the latest data from the Taiwan Stock Exchange and SITCA, between 2025 and 2026 the loss rate for retail investors participating in AI concept stocks reached 81%. Eight out of ten ended up losing money. The problem is not that you aren't smart enough. It is that the rules of the game you joined were never designed for you. This article breaks down three underlying rules: why the core reason for losses is a systematic bias in participation timing rather than stock-picking ability, why Taiwan's century-old iron rule (the market is a voting machine short-term and a weighing scale long-term) gets ignored by retail investors whose average equity holding period is under six months, and how financial institutions' business model systematically forces you to pay more than necessary. It then runs a 20-year wealth comparison showing a gap of more than NT$2 million between ideal execution, normal execution, and the 2008 black swan scenario, and closes with three Taiwan-specific blind spots (0050's top-10 concentration above 70%, dividend-tax filing-method optimization, and high-dividend ETF turnover risk) plus a four-step decision framework.