{"id":63615,"date":"2026-06-23T11:38:14","date_gmt":"2026-06-23T15:38:14","guid":{"rendered":"https:\/\/www2.stockmarketwatch.com\/stock-market-news\/global-markets-shaken-by-south-korean-tax-proposal-and-middle-east-diplomacy\/63615\/"},"modified":"2026-06-23T11:38:14","modified_gmt":"2026-06-23T15:38:14","slug":"global-markets-shaken-by-south-korean-tax-proposal-and-middle-east-diplomacy","status":"publish","type":"post","link":"https:\/\/www2.stockmarketwatch.com\/stock-market-news\/global-markets-shaken-by-south-korean-tax-proposal-and-middle-east-diplomacy\/63615\/","title":{"rendered":"Global Markets Shaken by South Korean Tax Proposal and Middle East Diplomacy"},"content":{"rendered":"<h2>Key Takeaways<\/h2>\n<ul>\n<li><strong>South Korean markets plunged<\/strong> following a legislative proposal to tax <strong>unrealized stock gains<\/strong>, sparking a &quot;Black Tuesday&quot; selloff in Seoul.<\/li>\n<li><strong>U.S. Vice President JD Vance and Secretary of State Marco Rubio<\/strong> confirmed a ceasefire monitoring group involving the <strong>U.S., Lebanon, and Iran<\/strong>, signaling a major diplomatic shift.<\/li>\n<li><strong>Bank of Canada Governor Tiff Macklem<\/strong> warned that <strong>high AI valuations<\/strong> pose a significant financial risk, as investors begin to question the monetization path for Big Tech.<\/li>\n<li><strong>Russia&#39;s Alexander Novak<\/strong> signaled a potential <strong>diesel export ban<\/strong> and the use of fuel reserves to stabilize a &quot;not simple&quot; domestic energy market.<\/li>\n<li><strong>Liquidity conditions<\/strong> have turned negative for the first time since 2021, according to key leading indicators, suggesting tightening financial conditions ahead.<\/li>\n<\/ul>\n<h3>South Korean &quot;Black Tuesday&quot; and Global Liquidity Concerns<\/h3>\n<p>South Korean markets experienced a sharp selloff on Tuesday as lawmakers and civic groups floated a controversial proposal to tax <strong>unrealized gains<\/strong> on stocks and real estate. The news triggered what local traders labeled <strong>&quot;Black Tuesday,&quot;<\/strong> with the <strong>KOSPI<\/strong> index plunging as investors feared the impact of taxing &quot;paper profits&quot; before they are realized. While the proposal is currently in the discussion stage at a National Assembly forum, the market reaction underscores the fragility of investor sentiment.<\/p>\n<p>Adding to the bearish tone, global liquidity indicators have turned <strong>negative for the first time since 2021<\/strong>. This warning signal suggests that the &quot;excess liquidity&quot; which fueled the post-pandemic rally is evaporating. Furthermore, retail investors who flocked to the <strong>SpaceX<\/strong> (<a href=\"\/stock\/SPACE\">SPACE<\/a>) IPO are reportedly &quot;underwater&quot; as the stock plummeted following record-breaking retail buying activity.<\/p>\n<h3>Major Diplomatic Breakthrough in the Middle East<\/h3>\n<p>In a significant geopolitical development, U.S. Vice President <strong>JD Vance<\/strong> and Secretary of State <strong>Marco Rubio<\/strong> held a high-level call with Lebanese President <strong>Joseph Aoun<\/strong>. The U.S. officials confirmed backing for the Lebanese government and detailed a <strong>U.S.-Lebanon-Iran ceasefire plan<\/strong> currently under review.<\/p>\n<p>The plan includes the formation of a <strong>joint monitoring cell<\/strong> composed of the United States, Lebanon, and the Islamic Republic of Iran to consolidate the ceasefire. Bank of Canada Governor <strong>Tiff Macklem<\/strong> called the potential Iran-US peace deal <strong>&quot;very welcome news,&quot;<\/strong> noting that falling <a href=\"https:\/\/stockmarketwatch.com\/energy\/crude-oil\" data-internallinksmanager029f6b8e52c=\"12\" title=\"Crude oil\">oil prices<\/a> resulting from eased tensions could reduce global inflation risks.<\/p>\n<h3>AI Monetization Fears and Central Bank Caution<\/h3>\n<p>Investor anxiety is mounting over the valuation of Big Tech leaders like Microsoft (<a href=\"\/stock\/MSFT\">MSFT<\/a>), Nvidia (<a href=\"\/stock\/NVDA\">NVDA<\/a>), and Alphabet (<a href=\"\/stock\/GOOGL\">GOOGL<\/a>). Concerns are growing that these companies may have reached a <strong>pricing ceiling<\/strong> for advanced Large Language Models (LLMs) while competition continues to drive token prices lower. Governor <strong>Macklem<\/strong> specifically cited <strong>high AI valuations as a financial risk<\/strong>, warning that massive data center investments may generate lower-than-expected returns.<\/p>\n<p>In the UK, <strong>Bank of England (BoE)<\/strong> official <strong>Taylor<\/strong> indicated that the focus on <strong>Quantitative Tightening (QT)<\/strong> sales adjustments will influence policy decisions through 2025. Taylor noted that current wage increases are more reminiscent of the stable environment of <strong>2011<\/strong> than the inflationary spike of <strong>2022<\/strong>, suggesting a potential softening in the BoE&#39;s hawkish stance.<\/p>\n<h3>Energy Markets and Fiscal Updates<\/h3>\n<p>Russia is facing a tightening fuel market, with Deputy Prime Minister <strong>Alexander Novak<\/strong> stating that oil companies have increased production to maximum levels. Novak revealed that Russia is considering a <strong>diesel export ban<\/strong> and has delayed refinery maintenance to ensure domestic supply. Despite these challenges, Novak insisted the situation remains &quot;under control&quot; even as the government taps into fuel reserves.<\/p>\n<p>In the U.S., the <strong>Treasury Department<\/strong> announced it will maintain its auction sizes, offering <strong>$70 billion in 4-week bills<\/strong>, <strong>$75 billion in 8-week bills<\/strong>, and <strong>$69 billion in 4-month bills<\/strong>. Meanwhile, dividend yields for the <strong><a href=\"https:\/\/stockmarketwatch.com\/indices\/sp500\/today\" data-internallinksmanager029f6b8e52c=\"3\" title=\"snp500 today\">S&amp;P 500<\/a><\/strong> (<a href=\"\/stock\/SPY\">SPY<\/a>) are hitting historic lows near <strong>1%<\/strong> as tech companies prioritize capital expenditure over payouts, though 31% of global firms still managed to lift payouts this quarter.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Key Takeaways South Korean markets plunged following a legislative proposal to tax unrealized stock gains, sparking a &quot;Black Tuesday&quot; selloff 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