Ignore bond yield creep at your own peril!
September traditionally is one of the worst months for the markets. In reality, September has, on average, seen barely damaging returns for the S&P 500 (^GSPC) courting back to 2006, per information from the Carson Group.
One day into September 2026, and we are being reminded that a slight damaging return — or something far worse — could occur yet again. This time, it’s occurring at the fingers of convulsing bond markets.
A worldwide authorities bond sell-off intensified right now with a ferocity that should alarm every investor, large and small. The yield on the 10-year US Treasury notice (^TNX) — the single most important rate of interest in the world, the price that units the price of everything from a mortgage to a car loan to a credit card — just hit its highest degree since January 2025.
Read more: How hovering Treasury yields could impression your funds
The 30-year yield (^TYX) is hovering around a two-decade high, which does nothing to help those planning for their long-term financial security.
And here is what makes this second particularly concerning: Bond yield creep is occurring globally.
Japan’s 10-year bond yield just climbed above 3% for the first time since 1996. British 10-year yields just hit their highest degree since mid-2007. German 10-year bonds are at ranges last seen in 2011 during the peak of the European debt disaster.
The main US stock averages all fell in response in early trading.
“The stock market has been able to ignore these moves so far this year. However, as we have seen in the past, higher yields don’t matter for stocks … until they do,” Miller Tabak strategist Matt Maley wrote in a notice.
When the bond markets in the US, Japan, the UK, and Germany are all promoting off at the same time, that is not a coincidence — that is a signal.
The signal is that traders worldwide are shedding confidence in governments’ skill to handle their debt, control inflation, and keep their fiscal homes in good order.
“Stocks have delivered positive returns across different rate regimes, with both rising and falling yields. The key distinction is what is driving rates,” BCA Research analysts said. “When inflation is the market’s focus, stocks and yields tend to be negatively correlated. When growth is the focus, that correlation is usually positive. Equities can thus absorb higher yields, but they struggle with rapid spikes. Conversely, while lower yields are mechanically supportive for multiples, a sharp decline often signals weaker earnings.”
Let a unstable September start!