Nvidia's web of AI bets: smart strategy or bubble risk?

Nvidia's $3 billion investment in Meta's share sale, announced Tuesday, is the latest addition to a portfolio of stakes, loans and guarantees that has made the chip giant what some analysts describe as the central bank of the artificial intelligence boom. Nvidia also has around $36 billion in cloud backstops and a guarantee of up to $105 billion linked to an OpenAI data center, according to US…