This is a nuanced setup. A simple “buy the dip” answer would be too blunt.

1. What ASML is really signalling

ASML Holding is showing a sharp demand rotation, not outright weakness:

Memory jump (30% → 51%) aligns with AI-driven HBM/NAND capex

Logic decline reflects timing and lumpiness, not structural collapse

The soft Q2 outlook matters because ASML sits upstream. When they guide cautiously, it usually reflects:

Order timing delays

Export control friction (especially China exposure)

Visibility gaps, not necessarily demand destruction

2. “Drop then rebound” pattern

That pattern exists, but it works best when:

Weakness is clearly temporary

End-demand remains intact

Right now, the memory surge actually supports the AI thesis, but export controls introduce a real overhang. This is not a clean technical dip.

3. Would I buy the dip?

More selective than aggressive:

Bull case (accumulate gradually):

If you believe AI capex remains strong into 2026, this rotation favours the ecosystem including NVIDIA, Micron Technology, and eventually ASML itself.

Cautious case (wait for confirmation):

If Q2 softness reflects broader digestion, ASML may range or drift lower before the next leg.

A staggered approach is more rational than a single dip buy.

4. Role of TSM’s guidance

TSMC is the demand validator.

If TSM beats and raises Q2:

Confirms AI compute demand is still accelerating

Likely triggers a sector-wide continuation rally

ASML dip becomes “missed entry” rather than opportunity

If TSM is cautious:

Reinforces ASML’s soft outlook

Broad semi consolidation likely

Bottom line

ASML is not breaking, it is rotating. The dip is buyable only if you are confident that AI-driven capex is intact. Otherwise, let TSM’s guidance confirm whether this is a pause or the start of a broader digestion phase.