US 10-Year Treasury Yield at 6% Emerges as New Market Risk Threshold

The US 10-year Treasury yield’s move above 5% is prompting investors to reassess where rising borrowing costs could begin causing serious stress across global financial markets. Once viewed as a critical ceiling, 5% may increasingly represent a waypoint, with some investors now focusing on the 5.5%-6% range.

Mike Bell, head of market strategy at BlueBay Asset Management, said there is no single Treasury yield that automatically triggers market turmoil. Instead, investors must consider yields relative to other measures, particularly stock earnings yields. That relationship is nearing levels that could increase pressure on equities.

Past episodes highlight the risks. Global stocks suffered steep declines after the 10-year Treasury yield crossed 5% ahead of the global financial crisis and after yields approached 6.8% around the dotcom crash.

However, JPMorgan analysts argue structural changes in the economy may allow markets to withstand higher rates today. Growth in artificial intelligence, healthcare and services means many companies continue investing despite elevated borrowing costs. As a result, some major investors see the potential stock-market “breaking threshold” closer to 5.5%-6%.

A sustained rise toward 6% would mark a major repricing in the $29 trillion US Treasury market, which serves as a benchmark for global asset prices. Such a move could reflect persistent inflation, concerns over US fiscal sustainability or expectations that interest rates will remain higher for longer.

Invesco’s Paul Jackson estimates global stocks become vulnerable when the 10-year yield averages 4.72% over 12 months and continues rising. The current 12-month average is about 4.34%, although Jackson has already reduced equity exposure while increasing allocations to government bonds.

Emerging markets could also face pressure as higher US Treasury yields strengthen the dollar, attract capital toward US assets and raise debt-servicing costs. Recent investment data showed sizable withdrawals from emerging-market bond and equity funds.

For investors, the central question is increasingly whether 6% Treasury yields would force a broader reset in stock valuations, signaling that the era of ultra-low borrowing costs has decisively ended.