The Small-Cap Effect in Semi Indices – Where Does the Alpha Come From?
Semiconductor indices are often discussed as if the real action sits entirely with the mega-caps. The biggest AI leaders, the dominant foundries, the top memory names, and the most visible equipment companies usually get the spotlight. But if you look more carefully, there is another layer of return behavior that can be surprisingly important: the small cap effect. In semiconductor indicators, smaller companies sometimes generate a disproportionate share of alpha, especially when the market broadens beyond the headline leaders or when the cycle starts to move from pure momentum into selective recovery.