Astera Labs up 13%. MRVL up 4%. The Philadelphia Semiconductor Index has lost nearly 10% over seven sessions. Those two things are happening simultaneously and the gap between them is the entire story.
This is straight dispersion. Broad semis sold off on macro pressure and rate anxiety. ALAB printed Q1 numbers that made clear hyperscaler AI capex hasn't slowed. The optical interconnect demand pipeline is intact. So the stock moves up 13% while the index bleeds.
What the options market will confirm tomorrow: ALAB's implied vol after this move reflects sustained data center spending expectations. The VIX-driven broad pressure hit commodity semis and legacy logic. It did not touch the AI infrastructure supply chain.
If you're watching for a rotation signal, the divergence between ALAB/MRVL and the PHLX is one of the cleaner reads on where institutional money thinks AI capex is actually going.
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