Anthropic’s offering will be a key test of investor appetite for AI companies after recent concerns over stretched valuations and heavy spending sparked a rout in chip stocks. Investors are also bracing for the Federal Reserve’s rate decision Wednesday and earnings from megacap companies this week, which will offer fresh clues on the outlook for the AI trade. “Anthropic’s IPO filing is expected to reignite interest in the AI sector,” said Hideyuki Ishiguro, chief strategist at Nomura Asset Management.