October 21, 2026 – On Back to the Future Day, investors hardly need reminding that predicting tomorrow is a tricky business. Corporate

Corporate earnings are broadening strongly despite a divided economy, but inflation, financing costs, and a prolonged housing slump argue against relying on a single market narrative.

• With only 9% of S&P 500 companies having reported third-quarter results, aggregate earnings are projected to rise 29% year over year, potentially extending the run of quarterly growth above 25% to three quarters.
• Ten of the S&P 500’s eleven sectors are expected to post positive third-quarter earnings growth, while the Other 493 companies are forecast to grow earnings 28%, compared with the Magnificent 7, and 31% in the fourth quarter versus 24% for the Magnificent 7.
• Affordability pressures are unevenly distributed: real median family net worth rose only 2% from 2022 to 2025, while households headed by people aged 75 or older gained about 37% and those headed by people under 35 lost more than 20%.
• Housing activity remains depressed: the median first-time buyer age reached 40 in 2025 from 31 in 2015, pending home sales fell 7.3% month over month in September to a record-low index reading of 66, and the NAHB sentiment index dropped to 29 in October.
• A 7.4% 30-year mortgage rate, declining permits, and builder incentives are weighing on a housing sector that represented 15.8% of GDP in the second quarter, while household formation slowed from 2.0 million in 2021 to 1.1 million in 2025.

Takeaway: Investors should participate in AI-related growth without depending on it exclusively, using diversification across sectors, company sizes, regions, and asset classes while monitoring upcoming earnings and the Federal Reserve decision against the risks from inflation, financing costs, and weak housing.