30-year Treasury yield is above 5% again — that's usually a bad sign for stocks

The 30-year Treasury yield has risen above 5% again, triggering concerns about the U.S. fiscal outlook and its potential negative impact on equities due to increased borrowing rates. A confluence of factors, including worries about a $16 billion 20-year Treasury bond auction, Moody's recent downgrade of U.S. government debt, and proposed tax cut extensions, are driving the selloff in long-dated government debt. While the market has occasionally shrugged off similar yield spikes, uncertainty remains about the sustainability of this resilience, particularly given broader concerns about excess debt and fiscal pressures.

Analysis

The 30-year Treasury yield has again surpassed the 5% threshold, a development historically associated with negative pressure on equities due to its impact on borrowing costs for households and businesses. This recent surge in long-dated U.S. government debt yields, affecting instruments from the 3-month Treasury bill through the 30-year bond, is driven by persistent concerns regarding the U.S. fiscal outlook. Contributing factors include apprehension surrounding an upcoming $16 billion auction of 20-year Treasury bonds, which Tom di Galoma of Mischler Financial Group indicated may see weak demand, partly due to Moody's recent downgrade of U.S. government debt to Aa1 from Aaa. Additionally, a proposed bill to extend 2017 tax cuts fuels concerns about financing what di Galoma termed "excess debt." While equities occasionally demonstrated resilience, such as on Monday when the S&P 500 gained despite an intraday breach of the 5% yield, historical precedents are mixed; for instance, multiple breaches in October 2023 led to a third consecutive monthly loss for the Dow and S&P 500. BMO Capital Markets strategists question if "this time is different," acknowledging the market's current focus on supply and inflation over recessionary fears but remaining skeptical about indefinite resilience, suggesting a stock market selloff could ultimately serve as a limiting factor for rising yields. These fiscal concerns are not isolated, with BofA noting similar pressures in other major developed nations since April.

Key Decisions for Investors

• Investors should closely monitor the outcome of the upcoming 20-year Treasury bond auction for indications of investor appetite for U.S. debt amidst heightened fiscal concerns and Moody's recent downgrade.
• Careful observation of developments related to U.S. fiscal policy, including the proposed extension of tax cuts, is warranted due to their potential to exacerbate debt financing pressures and influence bond yields and equity market sentiment.
• Given the historical tendency for stock market weakness when the 30-year yield exceeds 5%, despite occasional resilience, investors should assess portfolio sensitivity to sustained higher interest rates and consider strategies to mitigate potential downside risk in equities.