The iShares Russell 2000 ETF (IWM) climbed 1.1% Thursday, pushing the fund to fresh all-time highs and bringing its year-to-date gain to approximately 10%. This move followed the latest Bureau of Economic Analysis report showing U.S. GDP growth was revised up to a 4.4% annualized rate in Q3, well above consensus forecasts. Small-cap stocks in IWM outpaced large-cap benchmarks, with the Russell 2000 index itself rising to 2,730 points by mid-afternoon trading. Investors cited improved risk appetite after the suspension of proposed European tariffs and contained inflation readings as key catalysts.

Research from 22V Research highlights strong productivity growth as a primary driver for sustained small-cap outperformance. According to the firm’s recent strategy note, productivity gains have supported above-trend earnings growth in the small-cap arena without sparking fresh inflation pressures. Earnings revisions for companies in IWM have outpaced both their historical averages and those of mid- and large-caps, suggesting fundamentals are robust rather than driven by short-term positioning. Additionally, regional bank stocks—which constitute roughly 15% of the ETF’s weight—have reported solid credit metrics and stable deposit flows, reinforcing confidence in the small-cap credit environment.

Market participants increasingly expect the Federal Reserve to hold policy rates steady through the first quarter, with the earliest rate cuts now penciled in for March. This anticipated policy plateau underpins a favorable financing backdrop for IWM constituents, particularly capital-intensive industrials and tech hardware names beginning to integrate AI into physical products. Analysts at 22V note that AI adoption could serve as the next major catalyst for re-rating small-cap valuations, as management teams in the ETF have started to reference specific use cases for machine learning applications on recent earnings calls.