Why Stocks Hit Highs Even Though Borrowing Costs Are High
The S&P 500 came close to its first record high since August 2026 on October 5. Stocks around the world rose with it. Bloomberg
The Nasdaq hit an all-time high that same day. Traders looked past higher bond yields amid lower oil prices and AI optimism. Business Insider
The move followed a weak-to-mixed September and a firm start to October. The Dow, S&P 500 and Nasdaq opened higher to start trading in October 2026. In September, the S&P 500 fell 0.5%, the Dow fell 4.3%, and the Nasdaq rose 1.9% on strength in technology stocks. Quartz
In my view, the change from September to October is what to watch. September was narrow. Early October was broad.
Equities rotate from narrow to broad
In September, the three market measures were in different places. The Dow was down 4.3% while the Nasdaq was up 1.9%. Big tech stocks made up for weakness elsewhere. All three indexes opened higher on October 1.
By October 5, that wider rally had pushed the S&P 500 to the edge of its first record since August. Global stocks rose with U.S. stocks. The Nasdaq hit its all-time high at the same time.
The broader context here is rotation. A 4.3 point gap between the Dow and Nasdaq in September, then strength in both in October, fits that idea. When weaker stocks join strong stocks without the strong ones falling, the average can hit a record. That math pushed the S&P 500 toward its August high. Tech was still setting the price even as more stocks joined.
Duration reprices alongside equities
Bonds moved the opposite way from stocks. The 10-year Treasury yield, the interest the government pays to borrow for 10 years, was 5.307% on October 5. That was up 3 basis points on the day after touching 5.349%, up about 7 basis points, earlier in the day. A basis point is one-hundredth of a percentage point. CNBC
Another price source put the 10-year at 5.32% on October 6, up 0.01 percentage points from the day before. That means yields stayed above 5.30%.
Looking at what this means for your money, yields above 5.30% act like gravity on stocks. They make future profits worth less today. For stocks to rise anyway, investors must expect higher future profits or accept less extra pay for holding stocks. The Business Insider account points to higher profit hopes from AI, with lower oil easing costs for businesses and shoppers. The jump to 5.349% and settle at 5.307% shows investors were still finding the right bond price, not a one-way squeeze.
The broader context here is investors are betting on strong growth, not lower rates. Highs at 5.3% do not fit rising prices because rates are falling. The fit is steady earnings and AI spending carrying stocks. The extra pay for holding long bonds, called term premium, is doing a lot of work. Valuing distant profits at higher rates only works if those profits feel safer or investors take less pay for the risk.
Crude holds triple digits but flow eases
Brent oil held around $100 a barrel on October 6, with U.S. oil called WTI still below $90. ET Now Brent was little changed near $101 for October 6 trading, after a drop of about 2% on Monday. Bloomberg
Oil prices fell on October 6 because Middle East exports stayed strong and G7 countries released emergency stocks, like using food from a pantry in an emergency. U.S. News More exports from the Persian Gulf and a price cut by Saudi Arabia pointed to more oil available in early October.
In my view, the price level is still high but the direction is down. Near $100 keeps energy costs and headline inflation, or rising prices, high. Better export volumes and emergency releases ease near-term shortages and calm fears of a cutoff.
In my view, for savings and plans, the question is how long that oil help lasts. Brent steadied after the 2% fall, with Gulf oil flowing and prices trimmed. That lowers the worst-case risk but does not remove high prices. Experts will watch futures price gaps and local price differences for proof supply stays loose, not just one soft day. There is little cushion. Records built on both strong tech and wider stocks, with safe rates at 5.3%, need results. Slower AI payoffs or tighter oil would test both supports at once.
