US stocks: S&P 500 opens muted as Middle East tensions weigh

Stock markets opened with caution on Monday as investors considered renewed US-Iran tensions. The Dow Jones Industrial Average saw a slight decrease at the opening bell. Meanwhile, the S&P 500 experienced a modest rise in early trading. The Nasdaq Composite also climbed higher during the opening session. A strong revenue forecast from AI lab Anthropic provided some support for tech stocks.