Bitcoin’s price swings have been surprisingly muted compared to South Korea’s main stock index in 2026. Bloomberg data reveals that Bitcoin’s daily return volatility stands at 48%, while the KOSPI’s volatility hits 63%, driven largely by a couple of tech giants.

Tech Stocks Drive Market Turbulence

Samsung Electronics and SK Hynix, two memory chipmakers powering the AI surge, dominate the KOSPI. Together, they account for over half the index’s weight, and when you factor in affiliated companies, their influence grows even more pronounced. SK Hynix’s shares have soared in 2026 but also experienced sharp drops one recent slide wiped out more than 20% in just a month.

This concentration means the KOSPI acts almost like a leveraged bet on AI, and it’s heavily influenced by US market sentiment. For example, back in June when the KOSPI hit an all-time high, more than 650 of its 831 listed stocks actually declined, showing the uneven nature of the rally. SK Hynix itself plunged 27% in just three trading days due to concerns over data center spending, only to rebound with a 30% daily surge after sentiment shifted.

Retail Investors Fuel Wild Swings

A large portion of trading volume in these stocks comes from retail investors holding leveraged ETFs that track Samsung and SK Hynix. At times, these ETFs and their underlying shares have made up over 70% of daily trading value on a $3.4 trillion market. This extreme volatility has forced the Korea Exchange to halt trading nine times this year alone, compared to a single halt in 2024.

Officials, including Finance Minister Koo Yun Cheol, admit regulators moved too quickly in approving these leveraged products. New rules now include exposure limits and higher trading fees to protect retail traders from excessive risk.

Meanwhile, Bitcoin has seen a steadier decline. It started 2026 at around $88,000 and currently trades near $63,000, down roughly 29% year-to-date. From its October 2025 peak of $126,000, the drop reaches almost 50%. The price decline has unfolded in measured stages, dipping to $60,000 in February before rebounding briefly and dropping again near $57,000 in June. Traders link the pressure to slower ETF inflows and shifting capital flows.

This material is informational and not financial advice.