** Customer relationship management software developer Salesforce's CRM.N shares fall 4.8% to $158.56 premarket

** KeyBanc downgrades Salesforce to "Sector Weight" from "Overweight", citing concerns around Agentforce AI agent platform

** Brokerage says it sees little evidence of the revenue acceleration and believes upside is difficult to achieve in 2026

** Average rating of 54 analysts is "buy"; their median PT is $241.50 - LSEG data

** Up to last close, stock down ~37% YTD