90% of Retail Investors Lose Because They Cannot Let Go: The Wealthy "Lock-In and Double" Batch Profit-Taking Method
Have you ever made NT$300,000 on paper and ended up with nothing? Watching the uptrend candlesticks, your heart racing, finger hovering over the mouse, an inner voice saying "just a bit more"—then the price reverses, your NT$300,000 paper gain shrinks to NT$100,000 and then into loss. TWSE data shows that Taiwan retail investors' annual turnover is far higher than institutions, yet their overall returns lag the broader index over the long run. This article breaks down behavioral finance's disposition effect (selling winners too early, holding losers too long), the structural bias in Taiwan's financial media ecosystem that encourages holding rather than locking in gains, the real logic behind the wealthy "lock-in and double" approach, and provides the one-third profit-taking method (sell 1/3 at 20% gain, another 1/3 at 40%, trailing stop on the final 1/3), 4 iron rules, 4 action steps, age-based boundaries, and an extreme-market contingency plan. Closes by clarifying the critical difference between taking profit on Taiwan broad-market ETFs versus individual stocks, and the tax timing of profit-taking events.