Is a 7.7 Percent Slide From Its August Record the End of the Russell 2000's 2026 Lead Over Large Caps?

Key Highlights

• The Russell 2000 dropped 0.69 percent to 2,817.91 on September 28, about 7.7 percent below its August 14 record close of 3,052.85, a pullback felt by holders of the iShares Russell 2000 ETF (NYSEARCA:IWM).
• Small caps are down roughly 4.7 percent in September from an August 31 level near 2,956, and fell 0.80 percent in the week ended September 25 even as the S&P 500 rose 1.21 percent.
• The index was still up 15.9 percent year to date through September 21 versus 13.4 percent for the S&P 500, narrower than its 9.1 percentage point lead at the August peak.
• The iShares Russell 2000 ETF (NYSEARCA:IWM) traded at 19.21 times Earnings in mid-August versus 29.32 times for the iShares Russell 1000 ETF (NYSEARCA:IWB), a 34.5 percent discount.

Borrowing Costs Hit the Most Indebted Corner

Smaller companies tend to carry more Debt relative to earnings and refinance more often, so a 10-year Treasury Yield above 5.2 percent lands hardest on them. The Fed's September projections showed 12 of 18 policymakers expecting another 25 basis point hike this year, lifting the median 2026 and 2027 federal funds projections to 4.1 percent, a higher for longer path that pressures the Russell 2000. The 2-year yield, the Maturity most sensitive to Fed policy, swung from 4.71 percent on September 22 to 4.87 percent on September 24 as October hike odds jumped. Credit stress is building in the middle market that overlaps with many small caps. Fitch Ratings said the US private credit default rate hit a record 6.3 percent in August, and borrowers with EBITDA under USD 25 million defaulted at 12.0 percent.

Composition Leaves Small Caps Exposed to Banks and Health Care

Sector mix explains much of the divergence. Health care and financials make up 39.86 percent of the iShares Russell 2000 ETF (NYSEARCA:IWM), against 22.62 percent for large-cap peers in the Russell 1000, and the small-cap fund holds 1,967 stocks. It is also more volatile, with a three-year Beta of 1.27 and a three-year Standard Deviation of 19.98 percent. Regional lenders face refinancing strain in commercial property: the office CMBS delinquency rate jumped to 13.2 percent in August, its highest this decade, according to CRED iQ. At the same time, consolidation offers scale, as shown by the USD 3.9 billion all-stock Merger of WaFd (NASDAQ:WAFD) and EverBank Financial Corp announced in early September. Health care was one of only three S&P 500 sectors to rise on September 28, a small cushion for the small-cap mix.

What Could Restore the Lead

The economic backdrop is not the problem. The S&P Global flash composite PMI hit 58.4 in September, the strongest since July 2021, the Atlanta Fed GDPNow model estimated third-quarter growth at 5.0 percent as of September 25, and weekly jobless claims fell to 197,000. Domestic Demand of that strength usually favors smaller, US-focused companies. The obstacle is the price of money. The CME FedWatch Tool put the odds of a hike at the October 28 FOMC meeting at 72.5 percent as of September 28. August PCE data arrive on September 30, and the September jobs report on October 2 is expected to show about 100,000 new jobs and a 4.2 percent Unemployment rate. Softer readings would ease the rate pressure that has driven the pullback.

Where Things Stand

Not necessarily, but the lead is shrinking and now depends on rates. The Russell 2000 was still ahead of the S&P 500 for 2026 through September 21, even after falling 7.7 percent from its record, and the iShares Russell 2000 ETF (NYSEARCA:IWM) trades at a deep discount to large caps. That discount has not protected small caps while the 10-year yield sits above 5.2 percent and another Fed hike looks likely. If this week's Inflation and jobs data cool expectations, the valuation gap and a strong domestic economy could support a recovery. If yields keep climbing, the remaining year-to-date lead could erode further in October.