AMD Briefly Crossed $1 Trillion in Market Cap. Jim Cramer Says the Run Isn't Over

AMD briefly surpassed a $1 trillion market capitalization on Monday before slipping back below the milestone — and CNBC's Jim Cramer says the stock's monster run under CEO Lisa Su still has room to run.

The chipmaker rallied nearly 13% last week and has gained almost 30% in September alone. The latest surge was fueled in part by Meta's launch of Muse, its personal AI agent platform, which pushed investors to reconsider what AMD's processor business could be worth in an agentic AI economy.

"Lisa Su has orchestrated one of the greatest turnarounds in history at AMD, arguably the greatest of all time, and I see no sign that it's going to stop any time soon," the "Mad Money" host said Monday.

The agentic AI thesis

Cramer's argument centers on a shift that has reshaped how investors value semiconductor companies this year. The market's focus moved from AI model training to inference and agentics — and with it, toward the processors needed to actually run AI agents at scale.

"Earlier this year, the focus for investors shifted from AI model training to inference and agentics, and it became clear that demand for CPUs was going to explode, because you need more CPUs to run useful AI agents," Cramer said.

That framing matters for the broader AI hardware market. Training large models has been dominated by Nvidia's GPUs, but agentic AI — software agents that reason, plan and take actions on a user's behalf — puts a different load on compute infrastructure. On Cramer's reading, every useful AI agent deployment increases demand for central processing units, a market where he said AMD "remains the leader."

Meta's Muse launch gave that thesis a concrete catalyst. Muse is Meta's personal AI agent platform, and Meta is already one of AMD's biggest GPU customers — a relationship that ties AMD's fortunes directly to the rollout of agentic products by the largest AI spenders.

From $2.5 billion to nearly $1 trillion

The scale of AMD's turnaround under Su is difficult to overstate. When she took over as CEO in October 2014, the company was worth just over $2.5 billion and was losing market share to Intel. It was, by most accounts, a company fighting for survival in a duopoly market it was losing.

AMD shares have since surged more than 18,000%. Su refocused the company and steadily gained share in CPUs, first clawing back credibility with desktop and server processors, then converting that credibility into design wins with the largest cloud and AI buyers.

"What an incredible run," Cramer said. "Thanks to Lisa Su's understated, dogged, tenacious leadership, she transformed a $2.5 billion company into a nearly trillion-dollar powerhouse."

That trajectory — from $2.5 billion to briefly more than $1 trillion — puts AMD in a small club of semiconductor companies that have reached the trillion-dollar threshold, even if only momentarily. The Monday pullback below the milestone underscores the volatility that comes with a stock that has gained roughly 30% in a single month.

Taking on Nvidia — and making money doing it

While rebuilding its CPU business, AMD also carved out a foothold in the graphics processors used for AI workloads, taking on Nvidia in a market that Cramer said is large enough to support multiple winners.

AMD has already secured major commitments for its GPUs from some of the biggest AI spenders in the industry, including Meta and OpenAI. Those commitments matter because they anchor AMD's AI accelerator business with customers who have demonstrated they will spend tens of billions of dollars on AI compute.

"Nvidia's still the top dog in AI chips, but AMD's making big money, too, and [Su's] products are more competitive than people think," Cramer said. "Nvidia literally can't make their own chips fast enough to satisfy the demand. Of course there was room for AMD here."

That supply-constraint argument is central to the bull case for AMD's GPU business. If Nvidia cannot manufacture chips fast enough to satisfy demand for AI accelerators, buyers have an incentive to qualify AMD's alternatives — and AMD has converted that dynamic into concrete orders from Meta and OpenAI.

The risk side of the ledger

Cramer did not present the trade as risk-free. He acknowledged that AMD's enormous run leaves the stock vulnerable to pullbacks — a warning consistent with Monday's slip back below the $1 trillion mark after briefly crossing it.

Even so, his conclusion was that AMD's long-term opportunity remains intact. The combination of CPU leadership, a growing GPU business anchored by Meta and OpenAI, and a market-wide shift toward inference and agentic workloads gives the company multiple drivers, in his view, rather than a single bet on one product line.

The context for investors is straightforward: AMD's September surge reflects a repricing of what agentic AI means for processor demand, not just a reaction to a single product launch. If Cramer's thesis holds — that useful AI agents require more CPUs to run — then the Meta Muse launch that helped push AMD past $1 trillion may be an early data point in a longer trend rather than a one-off catalyst.

Cramer's Charitable Trust, the portfolio run by CNBC's Investing Club, owns shares of Intel, Meta and Nvidia — a disclosure relevant to weighing his commentary on the competitive dynamics among those companies. His remarks came amid a month in which AMD has been one of the market's standout performers, and the question heading into the rest of the year is whether agentic AI adoption can sustain the CPU demand growth that underpins the stock's new valuation.

For now, Cramer's verdict is that it can — and that Lisa Su's turnaround, nearly eleven years in the making, is not finished.