S&P 500 closed down 67 basis points Tuesday. The Philly Semi is off nearly 10% over seven sessions. On the surface that's a sector in distress. But look at what happened inside Tuesday's session and the real story is rotation, not collapse.

$Astera Labs(ALAB.US) up 12.6%. $Marvell Tech(MRVL.US) up 4%. $Micron Tech(MU.US) and $Sandisk(SNDK.US) up roughly 3% each. $Qualcomm(QCOM.US) down 4%.

These numbers don't coexist by accident. The market is drawing a hard line between two semiconductor categories: AI infrastructure (interconnect, optics, HBM memory) and legacy cycle exposure (consumer, handset, automotive). Qualcomm sits squarely in the second. ALAB is the purest expression of the first.

ALAB's Q1 revenue was USD 308 million, up 93% year-over-year. They guided USD 360 million next quarter — 17% sequential growth. The 30-year Treasury at 5.197% is putting pressure on high-multiple growth names. ALAB went up 13% anyway. That tells you the market is treating AI infrastructure cash flows as durable enough to hold through the rate environment.

I'm watching whether the optical and interconnect trade extends or gives back after a single-session pop of that magnitude. ALAB's earnings growth rate justifies the attention. The entry discipline after a 13% move requires more patience.

Those views can change at a moment's notice when the market changes.