Arm's forward P/E near 190 already prices in much of its expected growth, leaving a limited margin of safety. Its fundamentals are sound and AI and data center demand is strong, but a long-term position is better taken after a valuation pullback or further earnings delivery. x.com 

Arm is still expensive at about 40x revenue with only 20% growth, so it has not fallen enough. x.com 

Arm remains a long-term winner over the next 10 years, but not a short-term buy after running too far, too fast. Its performance has to catch up with at least part of the move, so buying at these levels carries elevated risk if a negative surprise hits. x.com 

Arm looks wildly overvalued at nearly a $500 billion market cap, about 96x sales and 150x next-twelve-month earnings. The euphoria shows in @steve2bacon calling it the easiest hold ever. x.com 

Arm is not worth buying more at about 150x forward earnings. The bottleneck it addresses and its pricing power are real, but it is still unproven whether Arm can capture enough of the profit to justify that multiple. x.com 

Arm ranks A tier among large and mega-cap tech after Q1 earnings on high-visibility licensing growth. Over $2B in new CPU hyperscaler long-term agreements and data-center royalties expected to double again support growth into 2027 and beyond, and forward royalty momentum is excellent. Smartphone seasonality could drag on near-term ramps. The ranking puts Arm below SanDisk and Alphabet in S tier and alongside AMD, Palantir and Meta. x.com 

Arm's valuation multiple is too high to be appealing. x.com 

Arm is far too expensive for slowing growth. It trades at 220x earnings and 45x 2026 revenue for about 20% top-line growth, while core royalty growth slowed from 27% last quarter to 11% and margins fell. Its push into data-center CPUs makes it roughly the 35th company launching them, in a market that will compete on price. x.com 

Arm's post-earnings rise makes little sense at over 40x sales, because the results did not justify it. Remaining performance obligations fell and consensus numbers saw only very modest adjustments, yet the shares rose after successive double-digit moves. x.com 

Arm is hard to justify over Nvidia, which is cheaper and growing faster. Arm trades at 44x sales and 112x earnings with 28% two-year sales growth and 32% EPS growth, while Nvidia trades at 11x sales and 20x earnings with 60%+ growth in both. There is more to an investment case than these figures. x.com