Economist Warns U.S. Stock Market Faces Volatility as Private Sector Lags Public Growth

Economist Jim Paulsen warns of impending U.S. stock market volatility, citing a concerning economic imbalance where private sector growth significantly lags public sector expansion. For Q1 2026, private sector real GDP grew only 1% year-over-year, while the public sector expanded 4%. Paulsen notes this reversal of historical trends, where private growth typically outpaces public, often precedes periods of market weakness. Historically, an expanding federal spending-to-GDP ratio has coincided with economic fragility and underperforming equity markets, including the early 2000s and post-financial crisis periods. Paulsen expressed concern that the Q1 2026 decline in the private-to-public real GDP ratio may mark the beginning of a sustained trend, potentially exacerbated by increased Q2 defense spending and ongoing private sector slowdowns due to high interest rates and energy prices.