Key points
- AMD's market value closed above $1 trillion for the first time
- Intel rose about 12 percent as the chip rally was pinned on Meta's new Muse AI agent
- The 10-year Treasury yield fell to 4.95 percent and crude dropped more than 5 percent
- I sold AMD for a triple, and the stock has nearly doubled again since
Today is a great day to own AI-related stocks. Advanced Micro Devices (AMD) crossed $1 trillion in market value for the first time on Monday and closed above it. The stock rose about 10 percent on the day. Intel (INTC), which I own, climbed about 12 percent.
Here's the milestone in plain numbers. AMD touched a session high of $616.68 and closed at $615.36. On about 1.63 billion shares, that high was worth roughly $1.005 trillion, and the close held above the $1 trillion mark for the first time.
Why I sold AMD too early
Now the honest part, and this one stings. I sold AMD a while back for about triple what I paid. At the time that felt like a great trade, and it was. Then the stock nearly doubled again after I walked away. So my clean 3x would be closer to a 6x if I'd just held. That's the AI trade in one sentence. The hardest part isn't buying, it's not selling.
What actually moved the market on Monday
My read is that Monday's move was macro first. The Nasdaq rose about 3 percent, the 10-year Treasury yield fell to 4.95 percent, and West Texas crude dropped more than 5 percent to around $95 a barrel. That was the backdrop for a broad risk-on move in growth stocks and chip names. I did not see an AMD announcement before the open that explained the move.
The Street's explanation came from a different company entirely. Bloomberg and Barron's tied Monday's chip surge to early traction for Muse, the new personal AI agent that Meta Platforms (META) launched on September 8, on the theory that agentic assistants lean on CPUs far harder than the GPU-heavy generative wave did. A breakout consumer agent reads as fresh demand for processor makers, and Arm jumped about 13 percent on the same tape. It is a narrative, not an order: no chip maker announced anything Monday, and the group got repriced on the reception of someone else's app, a demand signal at some distance from a booked sale.
That said, AMD isn't running on nothing. AMD said OpenAI agreed to deploy up to 6 gigawatts of its GPUs, with the first 1-gigawatt MI450 deployment scheduled for the second half of 2026. AMD also disclosed Oracle's planned initial deployment of 50,000 MI450 GPUs in its third-quarter release. Raymond James raised AMD to a Strong Buy rating with a $641 price target on August 25. AMD is up about 187 percent this year. The rotation just lit the fuse on a story that was already loaded.
Why I'm holding Intel
Then there is Intel. I'll be straight: Intel had no obvious company-specific news Monday and still jumped 12 percent. That is what a risk-on market can do to a stock investors have been waiting to forgive.
The setup underneath has improved. We covered reports that SK Hynix is in early talks to make memory chips at Intel plants, and Altera, which Intel owns 49 percent of, has filed confidentially for an IPO. Intel has more than quadrupled from its $28.73 low last September. I'm holding.
Is the AI trade really back on?
So is the AI trade back on? For a day, absolutely. AMD tagging $1 trillion is a real milestone, and I'm happy for everyone long the group, myself included on the Intel side. But a rotation driven by falling yields can rotate right back when yields turn. I own Intel because I believe in the turnaround, not because oil was cheap on a Monday. I'd want to see this hold through a close, and then another one, before I call it a trend instead of a good day.
Where I stand: I own Intel and I'm holding. I don't own AMD anymore, and Monday is a friendly reminder of why selling winners too early is the most expensive habit I've got.
Prices are as of the market close on September 21, 2026. Market-capitalization and percentage figures are by our arithmetic from those quotes unless otherwise attributed.
