Three Investment Lessons from 2025

2025년이 남긴 세 가지 투자 교훈
Watch on YouTube ↗  |  January 02, 2026 at 07:49  |  1:22:08  |  Chesley Investment Advisory (체슬리투자자문)
Speakers
Park Se-ik — CEO, ex-Chief Strategist

Summary

Park Se-ik and Choi Ho host a New Year newspaper-reading episode that reviews 2025 market performance and extracts investment lessons. The main implications are to avoid panic selling in US equities, judge valuations with growth-adjusted PEG rather than P/E alone, and avoid currency-hedged ETFs for long-term overseas investing. The hosts also highlight a continued AI/semiconductor cycle through at least 2029, with Korean semiconductor and ESS/lithium beneficiaries, while flagging risks around EV battery materials and consensus KOSPI targets.

  • 2025 KOSPI rose about 75.6% and KOSDAQ about 36.5%, led first by shipbuilding, power and nuclear, then by AI semiconductors.
  • Three investment lessons: do not panic sell in crashes, S&P 500 drawdowns often still end with positive annual returns, and P/E must be paired with EPS growth.
  • Long-term overseas investors should avoid currency-hedged ETFs because hedging costs drag returns.
  • Park Se-ik expects the AI and semiconductor cycle to run at least through 2029 and sees sharp memory-driven selloffs as buying opportunities with proper cash management.
  • Doosan Enerbility is highlighted for gas turbine localization and US export exposure tied to AI data-center power demand.
  • K-battery sentiment is weak on EV demand, but ESS demand and a rebounding lithium price are cited as reasons for patience.
  • Buffett's retirement, Berkshire's cash pile, and the new CEO are discussed without a clear trade.
  • The episode closes with personal-value reflections and a warning about impersonation scams.
Ideas
Park Se-ik CEO, ex-Chief Strategist 10:59
Avoid futures and options entirely.
Park strongly warns that futures and options are extremely dangerous because leverage and fixed expirations leave no time for losing positions to recover. He says investors should avoid them entirely, even if they think they have mastered stock investing.
Park Se-ik CEO, ex-Chief Strategist 38:43
Doosan Enerbility benefits from AI power demand.
Doosan Enerbility successfully localized and exported large gas turbines to the US after Chairman Park Ji-won's 20-year push, and AI data centers' need for stable power is driving gas turbine demand, making the company a scarce beneficiary of AI power infrastructure.
Park Se-ik CEO, ex-Chief Strategist 46:57
Don't panic sell the S&P 500.
The 2025 tariff shock caused a 19% S&P 500 drawdown, but it bottomed within a week and rebounded 38% by year-end; historically most years with 10%+ intra-year drawdowns still finish positive. Panic selling and technical trading in undervalued markets are mistakes, so investors should buy weakness rather than sell it.
Park Se-ik CEO, ex-Chief Strategist 50:50
Avoid currency-hedged ETFs for long-term investing.
For long-term overseas investing, currency-hedged ETFs incur hedging costs that drag returns and add structural risk; historical evidence favors unhedged exposure for better risk-adjusted efficiency. Investors should avoid the hedged versions.
Park Se-ik CEO, ex-Chief Strategist 58:54
Buy semiconductor dips through 2029.
Park believes the AI capex cycle, supported by joint US-China investment, will last at least until 2029, similar to the long shipbuilding boom. Korean semiconductor leaders Samsung Electronics and SK hynix are key beneficiaries via HBM and memory demand; although memory spot-price volatility can cause sharp corrections, 30-50% drawdowns should be bought aggressively with proper cash management.
Park Se-ik CEO, ex-Chief Strategist 70:41
Lithium rebound supported by ESS demand.
Lithium prices are rebounding because ESS demand from AI data centers is growing much faster than EV demand; even with EV weakness, ESS can offset it. Park sees the lithium rebound as a signal that battery demand is improving and tells battery investors to be hopeful and endure.
Park Se-ik CEO, ex-Chief Strategist 70:41
ESS offsets weak EV battery demand.
Although EV demand is weak after US subsidy cuts and contract cancellations, ESS demand from AI data centers and a KRW 1 trillion government ESS contract can offset that weakness. Park advises K-battery investors to be patient, highlighting Samsung SDI's 76% share of the first government ESS project and LG Energy Solution's remaining share as evidence of positioning.
Up Next

This Chesley Investment Advisory (체슬리투자자문) video, published January 02, 2026, features Park Se-ik discussing Futures/options, 034020.KS, SPY, Currency-hedged ETFs, SMH, 005930.KS, 000660.KS, LITHIUM, ESS/battery sector, 006400.KS, 373220.KS. 7 trade ideas extracted by AI with direction and confidence scoring.

Speakers: Park Se-ik  · Tickers: Futures/options, 034020.KS, SPY, Currency-hedged ETFs, SMH, 005930.KS, 000660.KS, LITHIUM, ESS/battery sector, 006400.KS, 373220.KS