Philadelphia Semiconductor Index rises 2.9%, memory chip index up 2.9%

Semiconductors outperforming the broader indices by such a wide margin suggests the market is treating chip exposure as a distinct trade rather than riding general risk appetite, and the fact that memory names matched logic names points to breadth within the sector. The dispersion underneath is the more telling signal: Lumentum, Arm and Synopsys gaining sharply alongside steep drops in DoorDash and MercadoLibre shows investors favoring hardware and design exposure over consumer-facing platforms. Whether that rotation holds, or proves a single-session move, is the open question.