Nvidia has spent the better part of three years as the most-watched stock in the world, and the argument now on the table is an unusual one for a company of its size: whether it is actually cheap.

According to simplywall.st, the question being asked is whether Nvidia still trades below fair value following fresh AI infrastructure demand. Fair value, in plain terms, is an estimate of what a business is worth based on the cash it is expected to generate — as opposed to whatever price the market happens to be quoting today. When the two diverge, investors see either a bargain or a warning sign.

The bull case has a prominent backer. According to finance.biggo.com, Bank of America has named Nvidia its top chip pick, describing the stock as sitting at a decade-low valuation ahead of the company's earnings report.

That framing is worth unpacking. A decade-low valuation does not mean the share price is low. It means the price relative to earnings has compressed, because profits have grown faster than the stock. A company can climb and get cheaper by that measure at the same time.

The swing factor in both items is demand for AI infrastructure — the data centers, servers and accelerators that companies are building out to train and run AI models. Nvidia's chips are the core input, so its valuation is effectively a bet on how long that construction cycle runs.

Neither source provides figures, price targets or earnings results, and the upcoming report is still ahead. What is on record is a valuation debate and one bank's bullish call.

It matters because Nvidia is now large enough that what investors decide it is worth moves index funds and retirement accounts held by people who never chose to bet on AI at all.