Inside the $900 billion data center investment opportunity. Erik Isakson/Getty Images There's a potential $900 billion opportunity for third-party data center investors, says Ares exec. AI bets were a theme of this year's earnings season across private equity and credit. Here's what the world's biggest private investors had to say about their AI investments. The AI data center bet keeps getting bigger. When asked on a recent earnings call how big the total market for digital infrastructure is, Blair Jacobson, co-president of private credit giant Ares, said it is a "multi-trillion-dollar market opportunity." Even excluding the hyperscalers' own spending , Jacobson said there's a $900 billion opportunity for third-party investment in data centers alone. And that's all before factoring in GPU financing or the enormous power buildout needed to support AI. The world's biggest investors are responding accordingly.…