As the Rotation Dies, Wall Street Is Blaming the Wrong Flaw in Small Caps

Critics have long pointed to an equity market breadth issue, with a narrow basket of tech giants driving most index returns. While participation improved through the second quarter, the broadening didn’t last long – surging energy prices and tightening financial conditions are reversing the course.

With Brent near $108 and the 30-year yield at 5.246%, the thesis that market participation would democratize is breaking down. Fundstrat notes the equal-weight S&P 500 has broken its uptrend as consumer discretionary, health care and financials weaken, “while semis and the Magnificent 7 prop up the SPX and Nasdaq 100.”

The Energy Resurgence and the Yield Squeeze

Geopolitical issues have, once again, taken the front seat as Iran-backed Houthis reportedly seized Yemen’s Red Sea port of Mocha and advanced toward the Hanish Islands, increasing their leverage over the Bab el-Mandeb Strait.

The Strait of Hormuz, through which roughly one-fifth of global oil once passed, remains severely disrupted, with only seven vessels crossing Wednesday.

The oil-rates linkage is unusually tight. Brean Capital calculates the daily correlation between oil and Treasury yields since Aug. 31 at 0.85, “which would be the highest monthly average since the Iran war began if it holds for September.” That co-movement is forcing markets to price a more hawkish Fed.

Deconstructing the Rotation Trap

Nowhere is this widening crack more visible than in the small-cap rotation. Over the last month, the iShares Russell 2000 ETF (NYSE:IWM) has declined more than twice as much as the State Street SPDR S&P 500 ETF (NYSE:SPY).

SPY vs. IWM daily chart (Source: TradingView)

Conventional market belief blames the small-cap struggles on floating-rate debt and interest rate sensitivity, yet, according to Franklin Templeton, it’s “an intuitive argument. It’s just one that history does not support.”

Citing Furey Research Partners, roughly one-third of Russell 2000 companies hold more cash than debt, while nearly half the index’s debt sits in firms representing just 12% of its market cap.

Arguably, earnings are the real driver. Over 2001–2025, the S&P SmallCap 600’s price closely tracked earnings growth—and small firms lack the pricing power and margins to rival mega-caps under stagflationary pressure.

Old Leaders Reassert Dominance

According to Nomura, a semiconductors-and-energy barbell portfolio re-emerged as one of the highest-Sharpe and strongest-performing baskets. The turnaround reflects renewed demand for exposure to AI-capex bottlenecks in compute and memory after much of that positioning was washed out.

The closely watched iShares Semiconductor ETF (NASDAQ:SOXX) is currently holding around 11.5% above July lows and more than 21% below the June high.

“You had too many people on one side of the boat,” Brad Warden, co-manager of the Nomura Science & Technology fund, said according to Barron’s.

“[Now there’s] a healthy setup as you go into the end of the year.” Chipmakers, he argues, will “generate a lot of cash flow, and buy back a lot of their stock.”

Meanwhile, Rocky Fishman, Founder of Asym Research, points out semiconductors now account for 60% of the S&P 500’s average daily move—meaning the index leans on old leadership rather than healthy internal participation.

Still, while there’s evidence demand will be there, Thomas Martin, a senior portfolio manager at Globalt Investments, is only slightly overweight, citing volatility risks.

“You’re liable to get your head handed to you if you put on an outsized position,” he warned.

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