AI and Buybacks: Is the S&P 500’s Rally Built to Last?

The S&P 500 is on fire, but maybe for the wrong reasons.
Just 10 stocks now make up nearly 40% of the entire index, a level of concentration not seen in decades. Nvidia alone represents more than 8% of the S&P 500.

Add to that a record-breaking $1.9 trillion global buyback boom, fueled by Fed easing and cheap money, and you’ve got a market that’s rising fast, but standing on a very narrow foundation.

Yes, AI is real. Salesforce’s Data Cloud + AI revenue jumped 120% year-over-year, and Microsoft, Google, and AWS are monetizing AI at scale. But when 80% of market gains come from just 10 names, the risk isn’t innovation,  it’s imbalance.

Meanwhile, tariffs and policy shifts are tightening margins, and global capital is starting to rotate toward Europe and Asia.

Bottom line:
This rally looks more engineered than earned. AI and buybacks are driving returns, but not broad-based growth. The question isn’t whether the market can rise higher, it’s how long it can rise on such narrow shoulders.

Read the full analysis: “AI and Buybacks: Is the S&P 500’s Rally Built to Last?”  posted on my website.

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