Rising oil prices explain only part of the Treasury yield spike, Korean investment blogger Meru argues, the bigger driver is a structural mismatch between how much debt Washington needs to sell and how much the market wants to buy. The 10-year yield broke above 4.7% intraday, and most coverage blames it on crude, since the Strait of Hormuz is blocked again and Houthi attacks threaten the Red Sea. Oil does feed into inflation broadly, through gasoline, plastics, fertilizer and power generation costs, but breakeven inflation, the rate implied by inflation-protected Treasuries, has barely moved, sitting around 2.3% for both 10 and 30-year debt. Instead, the 30-year real yield has climbed to its highest since the 2008 financial crisis, meaning borrowing itself has simply gotten more expensive. Meru traces that to Treasury supply and demand: the market has grown from $4.5 trillion in 2007 to $31 trillion today, China has flipped from buyer to net seller in favor of gold, Japanese investors sold $29.6 billion of Treasuries net in Q1 2026, and the Fed keeps shrinking its balance sheet. Washington's annual interest bill has topped $1.2 trillion, the FY2026 deficit is projected near $2.07 trillion, and a Supreme Court ruling against IEEPA tariffs forced billions in refunds that analysts say adds roughly $180 billion a year to the deficit through 2036. Big Tech is competing for the same buyers too: global corporate bond issuance hit a record $3.68 trillion in the first half of 2026, led by Amazon's $54 billion, forcing the Treasury to offer richer yields to compete for pension and insurance money.
Why it matters · A yield spike blamed on a temporary oil shock would fade once the Strait of Hormuz reopens, but a yield spike driven by structural deficits and Big Tech debt competing for the same buyers doesn't go away on its own, and it raises the discount rate on every future profit AI stocks are priced on.
Worth asking · Meru points to August 5th's Treasury quarterly refunding announcement as the next tell: if the phrase guaranteeing "at least" stable issuance sizes for coming quarters gets dropped, it signals more Treasury supply is coming in 2027. Is the yield spike mostly an oil story that fades, or a deficit story that doesn't?