ACM Research's cleaning business must have driven its unexpectedly strong revenue, including a higher-margin cleaning product. Q3 '36 revenue beat estimates by 20%; last quarter's voiceover foreshadowed the product, but the full release has yet to show the mix. x.com  x.com 

ACM Research should benefit as China's wafer fab equipment spending soars over the next couple of years across memory and leading-edge logic, more than offsetting lower mature-node spending. Its advanced packaging sales to non-Chinese clients are also growing well, and valuation looks reasonable after the recent pullback. x.com 

ACM Research looked great as a value stock, but less so once it is clear it only makes wafer-cleaning equipment. @masayoshisson sees it, like nearly every AI stock, showing textbook complacency before complete capitulation, perhaps a few months after an Anthropic IPO. x.com 

ACM Research is the best idea under $5B in market cap right now because China is going to keep pushing for localization. Ongoing dilution of its stake in its Shanghai subsidiary is a valid concern, but a necessary one. x.com  x.com 

ACM Research looks underpriced because its Chinese subsidiary alone has a backlog equal to about half the company's market cap. ACM Shanghai's backlog rose 88.2% to $2.5B, yet the stock barely reacted. x.com  x.com 

ACM Research carries binary China risk: China is about 97% of its business, and authorities could stop it any day, forcing management to choose between San Jose and China. The CCP's threats toward other countries make that exposure uglier, whatever the company's $4B revenue ambition. x.com  x.com  x.com 

US semiconductor equipment makers are the sturdiest picks-and-shovels play, because any industry expansion needs equipment first, giving them a place in every bull market. In the latest US tech selloff, chip and optical stocks fell broadly, yet equipment names jumped double digits at the open and nearly all closed higher, a clear vote by investors. The group spans Applied Materials, Lam, KLA, MKS, Entegris, Onto, Nova and ACM Research, with Axcelis, Ultra Clean and Veeco strongest. x.com 

Ultra Clean's earnings outlook and valuation leave it with the cleanest upside in semiconductors despite an ATM overhang. After a 67% stock correction, it trades at 8-10x forward EPS a few years out and is expected to generate $500M in EBITDA over the next three years. The ATM could dilute shares by 2% per quarter for two quarters; discounted 0% 2031 converts and potential convert buybacks offer a path to deleveraging. x.com 

ACM Research is the cleanest second-derivative play on AI capex, and Kimi's rise makes it more bullish. A China that is frontier-competitive in models but cannot buy Nvidia's best chips must build its own compute, HBM and packaging, and that spend lands on ACM Shanghai, its STAR-listed operating company, where new orders rose 65% year over year in Q1. Its new Lingang flagship site has about $3B of annual output capacity as it ramps. x.com  x.com  x.com 

Semiconductors could capture scarce spot compute's value if its forward curve holds. Compute trades in deep contango, while chip stocks price in little of that value; near-term moves are unpredictable. That makes the sector very bullish. The earlier lab-funding risk looks less acute: Anthropic should hold nearly $200B cash after its IPO and is operating-cash-flow profitable. Even with 2029 capex cuts, chips look cheap if future buyers do not default. x.com  x.com  x.com  x.com  x.com