Small caps led the US market at the halfway point for the first time since 2021 – and only the second time in the past decade. Meanwhile, we believe the AI trade remains a long-term secular growth story, a view echoed in our recent Retail Investor Beat survey, writes Bret Kenwell, US investment analyst at eToro US. The rally builds on the Russell 2000’s strong second half of 2025, when it also outpaced the S&P 500 Index (^SPX), Nasdaq, and Dow.