Societe Generale warns US Treasury yields above 4.5% may hurt stocks

The French bank's model identifies a threshold where rising bond yields flip from benign to destructive for equity markets.

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Add us on Google by Editorial Team May. 27, 2026

There’s a number that keeps showing up in risk models on Wall Street, and it’s 4.5%. Societe Generale strategists have identified that level on US Treasury yields as the point where the relationship between bonds and stocks turns from friendly to hostile, with rising yields actively dragging down equity prices once they cross that line.

The timing matters. The 10-year Treasury yield recently breached that exact threshold, while the 30-year yield has pushed past 5%, a level not seen since 2007.

The 4.5% line in the sand

According to Societe Generale’s proprietary model, the tipping point sits right around 4.5% on the 10-year Treasury. Below it, rising yields and rising stocks can coexist peacefully. Above it, the historical correlation turns distinctly negative.

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The mechanics are straightforward. Higher yields increase the discount rate applied to future corporate earnings, which mathematically reduces what those earnings are worth today. A company expected to generate $100 million in profit five years from now is worth less in present-value terms when the risk-free rate is 4.5% versus 3.5%.

When Treasuries offer yields above 4.5%, they become genuinely competitive with stocks for investor capital.

30-year yields tell an even sharper story

The 30-year Treasury crossing 5% is the more striking data point. That’s a level the long bond hasn’t touched since 2007, just before the financial crisis reshaped global markets.

Societe Generale has previously flagged yield-driven risks to equity markets. The combination of elevated borrowing costs and fixed-income competition is creating a two-pronged pressure on stock valuations that didn’t exist when yields were sitting comfortably below 4%.

What this means for investors

The sectors most vulnerable are the ones that benefited most from the low-rate era. Growth stocks, particularly in technology, derive a disproportionate share of their valuation from future earnings. Higher discount rates hit them harder than utilities or consumer staples that generate more of their value from near-term cash flows.

The key variable to watch is whether yields stabilize near current levels or continue climbing. If the 10-year settles around 4.5%, markets can likely adapt. If it pushes toward 5%, matching the 30-year’s trajectory, the equity headwinds identified by Societe Generale’s model would intensify considerably.

Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our Editorial Policy.