Concerns are surfacing regarding the health of the stock market, as economist Jim Paulsen of The Leuthold Group identifies a significant economic pattern that warrants attention. In a recent analysis shared on Substack, Paulsen raised alarms about the ratio of GDP contributions from the private sector versus the public sector—an indicator of economic growth that has been trending downward recently.
Historically, the private sector has experienced a growth rate that surpasses that of the public sector. However, this trend appears to have reversed in recent months, primarily due to heightened government spending coupled with sluggish growth among private companies. Paulsen highlighted that private real GDP witnessed a modest increase of just 1% year-over-year in the first quarter of 2026, in stark contrast to a 4% year-over-year uptick in public real GDP.
Paulsen’s analysis indicates that periods in which public sector growth outpaces that of the private sector typically signal challenges for stock market performance. Such instances have been grimly associated with economic downturns, including the turbulent times of World War II, the aftermath of the Great Financial Crisis, and the economic fallout during the COVID-19 pandemic. A historical review shows that the S&P 500 has generally seen declines during years when the private-to-public GDP ratio contracted, as experienced in the early 2000s and following the financial crisis.
He cautioned that the recent decline in the private/public real GDP ratio may not be a fleeting trend. Paulsen expressed concerns about upcoming quarters mirroring this pattern, particularly as defense spending escalates due to ongoing geopolitical tensions, including the conflict in Iran. He also pointed to expected continued slowdown in the private sector, citing factors such as rising interest rates and energy prices as restrictive influences.
The current landscape of the US economy resembles a bifurcation, with certain sectors thriving while others struggle. While activity in housing and manufacturing remains subdued, the technology sector has surged, driven by investor enthusiasm, substantial infrastructure spending, and favorable policies from the Trump administration. Notably, the technology, energy, and industrial sectors—benefactors of federal grants and partnerships—have performed robustly year-to-date, with tech stocks climbing nearly 29%.
Conversely, sectors like financials, healthcare, consumer discretionary, and communications have faced headwinds, with losses ranging from 1% to 7% since the start of the year, according to data from State Street Investment Management.
In summary, Paulsen’s insights highlight a pivotal moment for the stock market, underscoring the need for vigilance as the economy negotiates the interplay between private and public sector dynamics. Investors and analysts alike will be watching closely to see how these trends unfold in the coming months.
