Markets fluctuate as US rate worries temper tech bounce

After last week's rout, fuelled by fears that Democrats would ramp up regulation of artificial intelligence, beaten-down tech stocks have bounced this week on bargain-buying and a feeling that their fears may have been overdone.Sentiment was also given a boost by earnings from data centre operator CoreWeave, which said sales would come in at $13-13.3 billion (€11.6-11.9bn) this year, beating estimates.The news soothed worries about the company's health after it suffered heavy selling last month amid speculation that it could struggle to finance its vast debt pile as borrowing costs continued to rise.That sparked a period of panic over the tech sector as firms rely heavily on debt to fund their eye-watering AI investments.Also lifting confidence was Anthropic's filing showing it planned to raise up to $64 billion (€57.1bn) in its upcoming initial public offering, valuing it at as much as $1.4 trillion (€1.25trn).The maker of AI agent Claude had been expected to raise up to $100 billion (€89.2bn) in its IPO, which would have made it the largest IPO on record.The stock market debut is being seen as a gauge of how long the AI spending boom can last.Its filing also revealed that revenue soared to $17 billion (€15.2bn) in the third quarter, up from just $1.4 billion (€1.25bn) a year earlier.And in another sign of the sector's health…