US equity markets mixed after resuming trading following the Juneteenth holiday, with semiconductor stocks weighing on the Nasdaq - Dow gained +300-points or +0.77%. Salesforce Inc (up +4.31%) and Chevron Corp (+2.2%) were the leading performers in the 30-stock index. Amazon.com Inc +1.8% as Anthropic, the OpenAI competitor it backs, unveiled a more advanced version of its Claude chatbot.