Treasury bonds are good investments at this time of year — but not because of the Fed

Despite recent Federal Reserve commentary dampening expectations for a December rate cut, U.S. Treasury bonds historically exhibit a statistically significant year-end seasonal pattern, with prices typically peaking in late fall and bottoming in spring. This consistent trend, particularly strong in November-December, is attributed to seasonally varying investor risk aversion rather than macroeconomic factors or Fed policy. This suggests a potential seasonal trading dynamic for institutional investors, independent of immediate monetary policy shifts.

Analysis

Federal Reserve Chair Jerome Powell's recent comments have reduced expectations for a December rate cut, with CME's FedWatch Tool showing odds dropping from 90% to 72%. Despite this monetary policy shift, the U.S. Treasury market historically exhibits a statistically significant year-end seasonal pattern. Treasury prices typically peak in late fall and bottom in the spring, a trend observed since the early 1970s following the introduction of open-market auctions.

This seasonal strength is particularly evident in trailing two-month returns, with the November-December period showing higher average Treasury returns than any other two-month combination. This difference is statistically significant at the 95% confidence level. The pattern's emergence is linked to the market-driven price-setting mechanism established by auctions, as noted in a 2015 Critical Finance Review study.

Researchers have attributed this consistent seasonality not to macroeconomic factors or Fed cycles, but to "seasonally varying investor risk aversion." Specifically, increased risk aversion in the fall, potentially linked to seasonal affective disorder, drives Treasury prices higher, while diminishing risk aversion in the spring leads to price declines. This suggests a behavioral finance component influencing bond market dynamics independent of fundamental economic data or central bank policy.

Key Decisions for Investors

• Consider incorporating seasonal patterns into Treasury trading strategies, particularly for the November-December period, as this trend has shown statistical significance independent of Fed policy.
• Monitor investor sentiment and behavioral indicators, as "seasonally varying investor risk aversion" is identified as a key driver for Treasury price movements in late fall and spring.
• Evaluate potential long positions in Treasuries during late fall, acknowledging that this seasonal effect may offer a tailwind even amidst shifting monetary policy expectations.