The S&P 500 index climbed to an intraday record high of 7,844.52 on Tuesday, closing above 7,800 for the first time. The gain came one day after the 10-year Treasury yield topped 5.3 percent, its highest level since 2002.
But the headline move masks deteriorating breadth. The S&P 500 fell 0.3 percent in September, while its equal-weight version—which assigns equal value to every stock—dropped 4.8 percent that month. Large-cap technology gains obscured weakness across the market, according to Janus Henderson data.
Goldman Sachs' index excluding artificial intelligence enablers gained 6.7 percent over six months, versus 18.3 percent for the broader S&P 500 over the same period. The gap exposes a core risk: earnings growth and stock performance remain hostage to a narrow set of tech giants.
Stephanie Link, managing director at Hightower Advisors, sees rotation opportunity in industrials, financials, utilities and materials—all battered in September. Financials and materials each fell roughly seven percent last month. Link is watching Tuesday's 20-year nuclear power agreement between Google and Constellation Energy as a catalyst for the power and grid sector. Constellation shares rose more than 12 percent following the announcement, and Link expects increased order backlogs for infrastructure companies capitalizing on U.S. AI energy demand.
Link remains constructive on consumer spending and said lower interest rates and reduced oil prices would broaden her market thesis.
Jenny Harrington of Gilman Hill Asset Management noted that September's selloff hit entire sectors indiscriminately, regardless of individual company rate sensitivity. Her equity income strategy focuses on names yielding 5 percent or more—a cohort that was hit hard last month.
Energy prices and Federal Reserve policy emerge as the critical variables determining whether breadth returns. Kevin Simpson of Capital Wealth Planning said lower oil prices could ease inflation pressure on the Fed. Simpson, running a defensive portfolio, believes one additional rate hike in December could close out the tightening cycle if oil and inflation decline, potentially confirming the 5.3 percent 10-year Treasury yield as cycle peak.
Bryn Talkington of Requisite Capital Management disagreed. She expects multiple additional rate hikes to persist, choking off any rally broadening.
Earnings season begins next week. Talkington expects technology and energy sectors to dominate, but flagged a critical structural risk: Nvidia and Micron will account for roughly one-third of the S&P 500's overall earnings growth. Any meaningful rally broadening requires profit expansion outside AI hardware—a threshold that earnings will test immediately.
