Small Caps Just Had Their Best First Half in 35 Years. Here’s How the AI Wave Fueled a 21% Russell 2000 Surge

U.S. small-cap stocks have just recorded their strongest start to a year in 35 years. According to CNBC, the Russell 2000 has gained more than 21% year-to-date, putting it on track for its best first-half performance since 1991.^[CNBC] This small-cap breakout isn’t being driven by traditional cyclical sectors — it’s being ignited by the spreading ripple effects of the AI boom. Meanwhile, tech giant Nvidia (NVDA) came under pressure on July 2, closing at $194.83, down 1.39%, and briefly dipping below $193 during the session. The prevailing view is that money is rotating out of richly valued mega-cap tech and into more attractively priced small-cap AI plays.

Semiconductors Lead, AI Trade Finds New Ground in Small Caps

The leaders of this small-cap rally aren’t the usual consumer or industrial names — they’re heavily concentrated in semiconductor and semiconductor equipment companies.^[CNBC] This marks a sharp contrast with the past two years, when the AI trade was largely dominated by giants like Nvidia and Microsoft. As AI infrastructure investment spreads from data centers into edge computing, industrial automation, and other niches, a wave of smaller chip design, manufacturing, and packaging companies is starting to benefit.

Alger portfolio manager Amy Zhang told CNBC that the small-cap rally is “a combination of a valuation catch-up story and a fundamentals story.”^[CNBC] She argues that many small-cap companies have unique technological advantages in AI application deployment — an area that the market had largely overlooked. As valuation pressure mounts on mega-cap tech, investors are hunting for the next growth frontier, and small-cap AI stocks are getting the nod.

Nvidia Pulls Back, Mega-Cap vs. Small-Cap Divergence Widens

While the Russell 2000 has been charging higher, Nvidia — the undisputed AI compute leader — hit a speed bump on July 2. As of the close, Nvidia was at $194.83, down 1.39% from its prior close of $197.58. The stock opened at $197.14, touched an intraday high of $200.055, then slid to a low of $192.35 before stabilizing in after-hours trading.^[Finnhub]

This move echoes the growing debate over whether the AI trade has become too concentrated. While Nvidia dominates the AI chip market, its stock has soared over the past year, pushing valuations to historically high levels. In contrast, many small-cap names in the Russell 2000 — though smaller in size — offer more reasonable valuations and greater earnings flexibility. CNBC’s report notes that this small-cap rally is “not being driven by traditional small-cap names tied to the economic cycle,” but rather by emerging AI-focused forces.^[CNBC]

Analyst View: The Dual Logic of Valuation Repair and Earnings Growth

Wall Street analysts offer multiple explanations for the small-cap outperformance. Beyond the AI theme, valuation repair is a key factor. For most of 2024 and 2025, small caps significantly lagged large caps, pushing their relative valuations to historic lows. The first-half rally in 2026 is, in part, a correction of that gap.

“This is both a valuation catch-up story and a fundamentals story,” Amy Zhang added.^[CNBC] She believes many small-cap companies have strong earnings growth potential in niches like AI applications, automation software, and semiconductor equipment. For example, workforce management software company Ubeya recently highlighted its AI-powered scheduling capabilities, illustrating how AI is being deployed in vertical industries.^[TipRanks]

In addition, expectations for a shift in Federal Reserve monetary policy are providing a tailwind for small caps. Smaller companies are typically more sensitive to interest rates because they rely more heavily on debt financing. If the rate environment eases, the earnings pressure on small caps would diminish, potentially fueling further gains.

Outlook: Can the Small-Cap Rally Continue?

Despite the stunning first half, whether small caps can sustain their momentum into the second half remains an open question. On one hand, the commercialization of AI technology is accelerating, with more companies embedding AI into their core operations — opening up a vast growth runway for small-cap tech firms. On the other hand, shifts in macroeconomic data (such as employment and inflation) and geopolitical risks could still roil market sentiment.

Notably, the trajectory of mega-cap tech names like Nvidia will remain a key market barometer. If AI giants continue to deliver blowout earnings, money could flow back into large caps. Conversely, if large-cap tech corrects, small caps could continue to attract rotational inflows. As of the close on July 2, Nvidia’s dip already reflects a degree of caution toward high-valuation sectors.

This content is for informational purposes only and does not constitute investment advice, trading advice, or any guarantee of returns.