Societe Generale strategists have identified 4.5% on US Treasury yields as a critical threshold for the stock market. Below this level, rising yields and stock prices can coexist; however, above it, the historical correlation between bonds and stocks turns negative, meaning rising yields actively depress equity prices. This is because higher yields increase the discount rate applied to future corporate earnings, mathematically reducing their present value, and making Treasuries genuinely competitive with stocks for investor capital.
The 30-year Treasury yield surpassing 5% is noted as a particularly striking data point. Societe Generale has previously highlighted these yield-driven risks, noting that the combination of elevated borrowing costs and increased fixed-income competition creates a two-pronged pressure on stock valuations that was absent when yields were below 4%. The key variable to watch is whether yields stabilize or continue to climb, as a push toward 5% for the 10-year Treasury would significantly intensify the equity headwinds identified by their model.
Growth stocks, especially in the technology sector, are considered the most vulnerable. These companies derive a disproportionate share of their valuation from future earnings, making them more susceptible to higher discount rates compared to sectors like utilities or consumer staples, which generate more value from near-term cash flows. If the 10-year Treasury yield were to settle around 4.5%, markets might adapt, but a sustained climb towards 5% would present considerable challenges.
