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Here's your afternoon, T&B Tech Minute, for Friday, October 31st.

I'm Julie Chang for the Wall Street Journal. Inside Microsoft's earnings

was a charge that caught analysts by surprise, a $4.1 billion hit on its investment in OpenAI.

The figure was up 490% from a year earlier and implies a more than $12 billion quarterly loss at Open AI, which would mark one of the

largest single quarter losses for a tech company in history. OpenAI CEO Sam Altman has told

investors to expect years of heavy losses as a company invests to be a leader in AI.

Meanwhile, the flurry of Silicon Valley companies trying to build AI data

centers is spilling into debt markets. There's been a slew of public and private mega deals

since last month, including an $18 billion public corporate bond sale from Oracle and a $27 billion

private bond for Meta's Hyperion Data Center. According to a Bank

of America, hyperscalers would have to spend 94% of operating cash flow to pay for their

AI buildouts themselves and are therefore turning to debt investors to help offset some of that

cost. And charter communications profits fell in the third quarter.

The broadband communications company reported net income of $1.14 billion, down from $1.28 billion

the year prior.

Charter is facing more competition from fixed wireless and fiber connection services, which are cutting

into its home internet subscriber base, though the company is seeing continued gains in its mobile

business. In the third quarter, total internet customers fell by 109,000, but total mobile lines

increased by 493,000. Its TV business, meanwhile, is struggling as viewers opt for streaming

...