# Bond market faces supply glut — driving yields upward Excessive debt issuance and AI investments push bond yields higher. - **Source:** [Business Insider](https://www.businessinsider.com) - **Published:** 2026-09-02 - **Topic:** [Finance](https://brifing.si/c/finance) - **Original article:** - **On Brifing:** https://brifing.si/s/d60f0d45-e348-4d3b-9fce-d68bb82036d2 ## Why the bond selloff accelerated Global bond markets are experiencing sharp declines. The US 10-year Treasury yield surged to 4.81%, hitting a 3-year peak. Japan's 10-year yields surpassed 3%. This volatility was triggered by inflation concerns and Middle East tensions. However, the core issue is the excessive increase in bond supply flooding the market. ## US debt burden hits record high US federal debt exceeded $40 trillion for the first time. Potential conflict with Iran could necessitate additional spending. The government's growing borrowing needs are further increasing bond supply. Macquarie analysts note investors haven't lost faith in US Treasuries, but yields are rising due to oversupply. ## Tech giants' borrowing spree AI leaders like Alphabet, Amazon, Meta, Microsoft and Oracle issued $220 billion in bonds this year, setting records. These funds fuel investments in data centers and AI models. The flood of corporate bonds entering markets in Q3 and Q4 is straining liquidity further. ## Inadequate savings pool Government and corporate bonds are competing for limited savings. Relatively low personal savings are keeping yields elevated. Macquarie predicts AI investments will keep growing over the next 2 years, maintaining high corporate bond issuance. ## Mortgage to auto loan impacts Rising bond yields increase borrowing costs across the economy - from mortgages to student and auto loans. Higher rates discourage consumer spending and borrowing, potentially slowing economic growth. Stocks also suffer as investors become reluctant to pay high price/earnings multiples. ## Alarm bells for equities Macquarie warns rising yields could be the stock market's 'undoing.' Higher rates compress corporate profitability, depressing valuations. Growth stocks, especially tech, are more sensitive to rate hikes. Analysts note tightening liquidity could further pressure asset prices. ## Energy prices fuel inflation Middle East tensions keep energy prices elevated. Potential oil price spikes could intensify inflationary pressures. The Fed's continued tightening reinforces yield increases. Energy-driven inflation limits central banks' policy options. ## Searching for new equilibrium Markets seek balance between increased bond supply and low savings. Investors question sustainability of high yields. While long-term returns on AI investments remain uncertain, risk appetite declines. Portfolio diversification and risk management strategies gain prominence. ## Sources covering this story - https://www.businessinsider.com/bond-yields-rates-10-year-treasury-global-bond-market-selloff-2026-9 — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._