The Trap of the Algorithm-Designed 'Retail Investor Hell': How to Become a Money-Making Investor in a Stock Market Dominated by AI Trading | Former Wall Street Trader Lee Yong-jun

Summary

Lee Yong-jun, a former Wall Street trader and CEO of Insider Insight, explains that AI and algorithmic trading have already reshaped markets and shortened the life cycle of trading strategies. He argues that investors should focus on durable edges, passive/index investing, diversification, and time in the market rather than chasing success stories or trying to time every move. He also warns that AI/semiconductor valuations depend on continued credit expansion and discusses Korea's structural role as an exit-liquidity market for foreign capital.

• AI and algorithmic trading are already central; strategy alpha decays faster as competitors copy successful methods.
• Market efficiency makes active outperformance hard, and ETF/passive inflows have overtaken active funds.
• Retail investors are advised to favor long-term, diversified, index or quality-asset exposure rather than chasing success stories or timing.
• US surveillance and institutional processes make intentional retail-shakeout manipulation much less likely.
• Korea can serve as exit liquidity for foreign capital because of its size, purchasing power, and aggressive retail base.
• AI/semiconductor valuation risk hinges on whether credit expansion can continue to fund AI capex and justify valuations.