The Stock Market Is at Record Highs. The Bond Market Thinks That’s Insane.

EBM Newsdesk Analysis

19 May 2026. The S&P 500 hit a fresh record high last week. The 30-year US Treasury yield simultaneously rose to its highest level in nearly three years. The 10-year Treasury climbed above 4.5%. A key gauge of US inflation expectations — the one-year inflation swap — surged above 4% for the first time since early 2023. And some of the world’s most sophisticated institutional investors are now saying clearly what markets have been reluctant to hear: equities have not priced in what bond markets are screaming.

“Short-term, there are good reasons to be nervous,” warned Raphaël Thuin, Head of Capital Markets Strategies at Tikehau Capital, pointing to the incompatibility of equities at all-time highs and high interest rates simultaneously. Amundi’s Chief Investment Officer Vincent Mortier went further, warning that a market correction is not a risk but an inevitability, noting a fundamental shift in narrative between equity investors — still focused on AI earnings momentum — and bond investors, who are pricing in the sustained inflationary impact of oil above $100 per barrel following Iran’s closure of the Strait of Hormuz. Ecipe

The Disconnect in Numbers

The scale of the divergence between equity and bond markets is historically unusual. The S&P 500 hit a fresh record high last week while the median stock in the index sits 13% below its 52-week peak — a divergence described as the loudest warning the market has flashed since the dot-com era. This is not a broad rally. It is a narrow one, concentrated in a handful of AI-adjacent mega-cap names whose earnings momentum has been strong enough to carry the index higher even as the underlying market deteriorates. Chambers and Partners

The 14-day relative strength index on the S&P 500 has spent most of the past three weeks above 70 — the threshold that historically marks overbought conditions — and has shown a textbook negative divergence: price made a new high while RSI made a lower high. That same pattern appeared at the January 2018 top, the February 2020 top, and the late 2021 peak. The advance-decline line for the broader NYSE has rolled over even as the index pushes higher. The percentage of S&P 500 stocks above their 200-day moving average has fallen to around 56% while the index itself prints new highs. Chambers and Partners

Why Bonds Are the Signal to Watch

Equity markets have been propelled by robust first-quarter earnings and AI expectations, overshadowing the risk of high energy prices and the lack of resolution to the Iran conflict. But the spike in bond yields over the past week — which took the 30-year Treasury above 5% and 10-year bonds above 4.5% — could materially change the picture for investors. EU Trade

Morgan Stanley’s Mike Wilson warned that equities face their first meaningful correction since late March if bond market volatility persists, even as the bank simultaneously raised its 12-month S&P 500 target to 8,300. Wilson tied the Treasury selloff directly to surging oil prices and the Federal Reserve’s increasingly hawkish tone under new chair Kevin Warsh, arguing that a lasting resolution to the Iran conflict is what bond markets need before rates can meaningfully retreat. Ecipe

This is the core tension. Equity investors are betting that AI-driven earnings growth is strong enough to absorb higher rates indefinitely. Bond investors are betting that oil above $100 forces central banks to act, which compresses the multiples that justify record equity valuations. Both cannot be right simultaneously.

The European Dimension

The bond pressure is not confined to America. Japanese yields surged to levels not seen in several decades, underscoring that the bond market stress is a global phenomenon rather than a purely American one. Germany’s 10-year Bund yield has climbed to 15-year highs as European markets price in ECB rate hikes. European equities, which rallied strongly in the first quarter on hopes of a German fiscal stimulus and a recovery trade, are now facing the same bond-equity incompatibility that US investors are wrestling with. Ecipe

The traditional inverse relationship between stocks and bonds — which formed the basis of diversification strategies from 2000 to 2019 — has broken down since 2020, with both asset classes now tending to sell off concurrently in response to rising market stress. This reinforces equity risk in the US, Germany, Japan and the UK simultaneously. The portfolio protection that investors assumed they had simply no longer works the way it did. EU Trade

The Catalyst Question

A catch-up rally in lagging stocks — the optimistic resolution to the narrow market breadth problem — requires a catalyst, and the catalysts currently available are not friendly to the laggards. Consumer stocks need lower energy prices. Industrials and materials need improving global growth. Financials need a steepening yield curve and falling credit spreads. None of those conditions are present. Chambers and Partners

The honest answer is that markets are waiting for the Iran situation to resolve — and until it does, the stagflation scenario that Deutsche Bank and the ECB have been warning about gets more not less likely with each passing week. A correction does not require a catalyst to trigger it. Sometimes the correction is itself the discovery that the catalyst never came.