- South Korea’s unrealized gains tax debate sparks panic and deepens market selloff.
- Chip stocks and leveraged positions intensify the Kospi’s historic 10% plunge.
- Global rebalancing and hawkish Fed outlook amplify pressure on risk assets.
South Korean financial markets suffered a sharp selloff on Tuesday after lawmakers discussed a proposal that could tax unrealized gains on stocks and real estate. The discussion rattled investors and added pressure to an already fragile global market environment.
The benchmark Kospi plunged 10%, triggering a circuit breaker for the second time this month. Major technology stocks led the decline, while concerns over leverage, monetary policy, and global portfolio adjustments amplified the market shock. Consequently, investors rushed to reduce risk exposure across several asset classes.
Tax Debate Raises Investor Concerns
The latest proposal emerged during a forum hosted by South Korea’s ruling Democratic Party. Lawmakers explored a framework that would classify unrealized gains as taxable income.
Under current rules, investors pay taxes only after selling an asset for a profit. However, the new proposal would create tax obligations based on paper gains alone.
The discussion follows several wealth-tax initiatives introduced throughout 2026. In February, policymakers proposed lowering the real estate capital gains exemption threshold from 1.2 billion won to 800 million won.
Additionally, lawmakers pushed in April to eliminate long-term holding tax deductions. Tuesday marked the first time policymakers openly extended the discussion to unrealized gains in equities.
Chip Stocks and Leverage Accelerate the Decline
Technology shares intensified the market downturn. Samsung Electronics and SK Hynix each fell more than 12% during the session. Moreover, reports suggested that SK Hynix may slow expansion plans for a new chip project while increasing focus on lower-priced memory products.
The development raised questions about demand expectations in the artificial intelligence sector. Besides, retail investors had accumulated large positions in semiconductor stocks using borrowed funds. Regulators previously warned that valuations had become stretched. Once prices began falling, margin-related selling accelerated the decline.
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Global Pressures Add to Market Stress
Several international factors compounded the market weakness. JPMorgan estimated that quarter-end portfolio rebalancing could generate as much as $165 billion in global equity selling before June 30. Hence, large institutional investors may continue reducing stock exposure in coming days.
Meanwhile, Federal Reserve officials maintained a hawkish stance. Nine of nineteen policymakers projected at least one rate increase this year, while markets assigned a 70% probability to a September hike.
Currency markets also attracted attention. Sharp moves in USD/JPY fueled speculation about potential Japanese intervention. Such action could disrupt the yen carry trade and trigger selling across multiple markets simultaneously.
Significantly, gold, silver, and technology stocks declined together, a pattern often associated with broad deleveraging. The Nasdaq fell 2.33% previously, while futures pointed to another 2.50% drop. Furthermore, SpaceX dropped 16%, and Alphabet lost 5%, highlighting growing pressure across the global technology sector.
Related: 5 Reasons for South Korea Stock Market Crash Today
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