S&P 500 Hits Record 7,799 as Bond Market Warns on Inflation

Wall Street's record equity rally is colliding with a bond market flashing decade-high real yields and record inflation risk.

The S&P 500 closed at a record 7,798.99 on Aug. 13, up 0.7 percent, after July producer prices came in flat, cutting the odds of a September Federal Reserve rate hike to about 35 percent from 55 percent a week earlier.

The split is the central tension of the rally, with real yields on 30-year Treasuries near 18-year peaks at about 3 percent, according to a Reuters analysis that flags the AI-driven surge in corporate borrowing as the next risk for markets and growth. A Barron's commentary published Aug. 14 framed the same divergence bluntly: stocks are "flying off the shelves" even as bonds warn of "massive economic and inflation risks."

The Nasdaq Composite advanced 0.8 percent to 26,803, while the Dow Jones Industrial Average added 0.13 percent to 53,840. The 10-year Treasury yield slipped 5 basis points to 4.65 percent, and Brent crude fell 2.1 percent to $87.07 a barrel. Technology and communication services led the advance, with the VanEck Semiconductor ETF rising 2 percent.

The bond market's warning matters because AI leaders Alphabet, Amazon and Meta have sold nearly $220 billion in bonds this year, pushing real yields to levels last seen before the 2008 crisis and raising the cost of capital for the very companies driving the equity rally.

Real Yields at Decade Highs

The bond market's caution is not new, but it is intensifying. Real yields on 10-year U.S. Treasuries have climbed to decade highs, and the 30-year real yield sits near 3 percent, an 18-year peak, per the Reuters analysis. The driver is supply: Alphabet, Amazon and Meta collectively sold nearly $220 billion in bonds this year, part of a record AI-infrastructure borrowing spree that, combined with widening government deficits, is pushing yields higher even as the Fed holds rates.

That supply pressure is the mechanism behind the divergence. Equities have absorbed the record borrowing because AI earnings growth — S&P 500 net profit margins hit an all-time high of 16.9 percent in the second quarter, per FactSet — has kept pace. But the bond market is pricing the long-run cost: higher real yields raise the discount rate on future earnings, a headwind that grows with every new AI bond sale.

Valuations Stretch as Rally Broadens

The equity side of the trade shows little sign of cooling. The S&P 500 set an intraday record of 7,816.70 on Aug. 13, with advancing stocks beating decliners by 1.7-to-1 and eight of 11 sectors closing higher. The Russell 2000 added 0.61 percent, surpassing 3,060 intraday, as small caps joined the advance.

Yet valuation gauges are flashing their own warnings. The Buffett indicator — U.S. market capitalization against GDP — hit a record 238 percent, and the Shiller CAPE ratio reached 41, more than double the long-run average of 17.8, levels last seen before the dot-com bust and the 2022 bear market.

The next test comes Aug. 14, when July retail sales data land alongside the Fed's preferred inflation signals. A hot print would revive September rate-hike bets and pressure the equity rally; a soft one would extend it. For now, traders are betting on the latter, with Polymarket pricing a 57 percent chance the S&P 500 opens higher.

This article is for informational purposes only and does not constitute investment advice.