Nvidia, the chipmaker at the center of the artificial intelligence boom, has returned to the public bond market with a $25 billion debt sale, according to Forbes.

It is a notable move for a company famous for its cash riches. As Forbes reports, Nvidia had not borrowed in the public bond market since 2021 — making this its first such sale in five years.

Forbes frames the decision as a sign of just how expensive building AI has become. The cost of constructing the data centers, networking and computing power behind modern AI has grown so large, the outlet notes, that it now reaches into the "staid" world of corporate bonds — the slow-moving market where companies raise money by borrowing from investors rather than spending their own reserves.

In plain terms, a bond sale is an IOU at scale: Nvidia receives $25 billion now from investors and agrees to pay it back later, with interest. Companies often choose this route when they want to fund big projects while keeping their own cash on hand, or when borrowing is cheaper than other options.

The sources here do not detail the specific projects the money will fund, the interest rate Nvidia agreed to, or the bonds' maturity dates, so those details remain open.

Why it matters: When a company as cash-rich as Nvidia chooses to borrow $25 billion, it signals that the price tag for staying ahead in AI has climbed to a scale that even the industry's biggest winners are now financing with debt.