Arm Holdings (ARM) Delivers Strong Growth, but Has the Valuation Run Too Far? 

Sustainable Growth Advisers (SGA), an investment management company, released its second-quarter 2026 investor letter for its “Global Growth Strategy.” The letter can be downloaded here. The SGA Global Growth Portfolio returned 7.4% gross and 7.2% net, compared with 14.9% for the MSCI ACWI and 19.8% for the MSCI ACWI Growth Index. Momentum leadership and enthusiasm around AI infrastructure drove markets, with semiconductor, memory, and hardware stocks accounting for much of the gain....