CoreWeave extends rally, gains widen to 25% in biggest jump since June 2025

A gain of this size without a cited catalyst points to positioning and momentum rather than fresh fundamentals, which makes the move more a sentiment signal than a re-rating. For a listed AI cloud provider, that kind of volatility cuts both ways: it draws attention to the sector's infrastructure names, but it also raises the question of how much of the run-up is durable. The open question is whether the rally holds once the flow-driven buying fades, and whether any disclosure later explains the move.