Is the US economy cracking into a new reality—consumer signals, $40T debt pressure, and a K-shaped unwind?

On Aug. 25, 2026, Abby Joseph Cohen—Columbia Business School professor and former Goldman Sachs partner—told Bloomberg “The Close” that recent consumer spending patterns are signaling uneven stress in the US economy rather than a smooth, broad-based expansion. In the same discussion, she cautioned that AI-related investing may not be sustainable at current expectations, framing a risk of valuation and demand mismatch. Separately, former Rep. Kevin Brady, speaking on the scale of US fiscal arithmetic, argued that Congress will have to act to address roughly $40T in US debt as spending continues to outpace restraint despite record revenues. Brady emphasized that lawmakers may need to revisit large entitlement programs such as Social Security and Medicaid, which he described as moving toward unsustainable trajectories. Taken together, the articles point to a US macro regime where consumption is diverging across households and where fiscal constraints are re-entering the policy conversation. A “K-shaped” economy—where gains concentrate among certain groups while others lag—appears to be under scrutiny, with market commentators asking whether the split is ending or merely changing form. The geopolitical relevance comes indirectly but materially through the US role in global capital markets: if consumer demand weakens unevenly and fiscal credibility becomes a live political battleground, it can affect Treasury risk premia, the dollar’s path, and global funding conditions. In that environment, investors may reprice both growth and duration risk, while policymakers face pressure to balance entitlement reform, tax policy, and near-term stabilization. Market implications are likely to concentrate in rate-sensitive and consumer-linked segments, even if the articles do not name specific tickers. If consumer spending is uneven, discretionary retail, travel, and parts of consumer credit could face higher default risk, while “quality” defensives may outperform, reinforcing a bifurcated equity leadership pattern. The debt framing—Congress needing to reduce spending amid large entitlement obligations—raises the probability of renewed fiscal-policy headlines that can lift term premia and keep long-end yields volatile, pressuring mortgage rates and rate-sensitive sectors. The AI sustainability warning adds a second channel: investors may rotate away from the most expensive AI exposure toward cash-flow durability, affecting semiconductors, cloud infrastructure, and high-multiple software valuations. Currency and commodities are not directly cited, but a shift in Treasury yields typically transmits to USD funding costs and broader risk appetite. What to watch next is whether the “uneven consumer” narrative translates into hard data—retail sales breadth, credit delinquencies, and household balance-sheet indicators—rather than remaining a commentary theme. On the policy side, the key trigger is whether Congress signals concrete entitlement or spending-reduction pathways, especially any movement toward Social Security and Medicaid reforms that Brady highlighted. For markets, the near-term catalyst is the Jackson Hole Federal Reserve preview referenced by Cohen, where guidance on inflation, labor-market resilience, and the path of rates could either validate or challenge the market’s pricing of growth. Finally, for AI, watch for evidence that demand and earnings are catching up to investment cycles—if not, the “not sustainable” warning could become a catalyst for further multiple compression and tighter financial conditions.

Geopolitical Implications

• 01

  Fiscal and consumption divergence can shift global Treasury risk premia and USD funding conditions.

• 02

  Entitlement reform debates may become a recurring political risk factor for long-run US policy credibility.

• 03

  A cooling in AI investment expectations could alter US growth leadership and influence allied investment sentiment tied to US capital markets.

Key Signals

• —Retail sales breadth and household credit delinquency trends
• —Concrete Congressional proposals on Social Security and Medicaid spending restraint
• —Jackson Hole Fed language on inflation persistence and the rate path
• —AI sector earnings/cash-flow evidence versus valuation expectations