Yen's movement that dropped KOSPI by 15% in the past... Are there still variables that will shake the Korean stock market?

Yen's movement that dropped KOSPI by 15% in the past... Are there still variables that will shake the Korean stock market? | Myeong Min-jun, Park Ga-young, Song Jae-kyung [Stock Beginner Rescue Team]
Watch on YouTube ↗  |  August 03, 2026 at 13:30  |  46:35  |  3PRO TV (삼프로TV)
Speakers
Song Jaekyung — CEO

Summary

Song Jae-kyung, CEO of Dimension Investment Advisory, discusses macro risks for Korean equities, focusing on the US 10-year Treasury yield approaching a 5% red line and the potential for a Yen carry trade unwind. He warns that rising long-end yields and bear steepening could lead to equity market pressure. He advises avoiding KOSPI rallies in H2 and the over-owned semiconductor sector, while monitoring the Yen for further strength. He recommends a balanced portfolio amid seasonal weakness and midterm election uncertainty.

  • US 10Y yield near 5% could invert stock-bond correlation, signaling downside risk for equities.
  • Japanese Yen short positioning and coordinated intervention may trigger a carry trade unwind, recalling the 15% KOSPI drop in 2023.
  • KOSPI likely to face a difficult second half with macro headwinds; chasing rallies is dangerous.
  • Korean semiconductor sector is over-concentrated and should be avoided due to potential underperformance.
  • Seasonal weakness from August to October and US midterm elections add uncertainty.
  • Investors should maintain balanced portfolios and avoid concentrated bets.
Ideas
Watch US 10Y at 5% red line.
The US 10-year Treasury yield is approaching the 5% red line. Historically, when the 10Y rises above 5%, the correlation with equities turns negative — stocks fall as yields rise. The current rise is driven by high real rates due to fiscal concerns and term premium, not just inflation expectations. A sustained break above 5% could trigger significant equity market downside, so investors must monitor the yield daily.
Watch Yen for carry trade unwind.
Japanese Yen short positioning is at extreme levels similar to before the 2023 carry trade unwind. Recent coordinated US-Japan intervention to strengthen the Yen could spark a short squeeze. If the Yen strengthens further, it could trigger a sharp unwinding of Yen carry trades, causing a sell-off in risk assets including Korean equities (KOSPI fell 15% during the last such event). Monitor Yen direction closely as a risk variable.
Avoid KOSPI rallies in H2.
The KOSPI is unlikely to replicate its strong H1 performance in H2 due to higher US rates, macro headwinds, and seasonal weakness (August–October). Bounces should be viewed with skepticism: avoid chasing rallies and buying on declines, as the market will likely be choppy and sideway. US midterm election year also adds to downside risk. KOSPI rallies are not a buy opportunity now.
Avoid Korean semiconductor sector.
Korean semiconductor sector is heavily owned and over-concentrated after recent drawdowns. Many investors are still holding, creating overhead supply. In a rotation environment with macro uncertainty, the sector could underperform. Investors should avoid concentrated bets on semiconductors and consider reducing exposure.
Up Next

This 3PRO TV (삼프로TV) video, published August 03, 2026, features Song Jaekyung discussing US10Y, FXY, EWY, Korean semiconductor sector. 4 trade ideas extracted by AI with direction and confidence scoring.

Speakers: Song Jaekyung  · Tickers: US10Y, FXY, EWY, Korean semiconductor sector