The Trump Bull Market Has a Very Dark Side That Could End Badly for Investors

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Rich Duprey

Tue, May 19, 2026 astatine 6:03 AM CDT 5 min read

Quick Read

Stocks: Nvidia (NVDA), Microsoft (MSFT), and Alphabet (GOOG) predominate the S&P 500’s 23.5% summation since January, with the 10 largest companies present representing astir 40% of the index’s worth portion astir different stocks lag behind.
The S&P 500’s rally is built connected dangerously concentrated AI enactment and grounds borderline indebtedness of $1.304 trillion (53% summation successful 12 months), creating fragility wherever a humble correction could accelerate into a crisp diminution arsenic borderline calls unit automatic liquidations.
The expert who called NVIDIA successful 2010 conscionable named his apical 10 AI stocks. Get them present FREE.

The banal marketplace has climbed a partition of interest since President Donald Trump returned to the White House connected Jan. 20, 2025. Tariff fights rattled investors. Treasury yields spiked. Recession fears surfaced much than once. Yet the benchmark S&P 500 has inactive surged astir 23.5% since Inauguration Day.

That benignant of resilience usually feels bullish. And to beryllium fair, artificial quality has delivered existent growth. Corporate spending connected AI infrastructure continues climbing, unreality request remains firm, and semiconductor giants support posting eye-popping gross gains.

But here's the uncomfortable question savvy investors should ask: What happens erstwhile excessively galore investors commencement believing markets lone spell up?

The expert who called NVIDIA successful 2010 conscionable named his apical 10 stocks. Get them present FREE.

AI Stocks Are Carrying the Market

Let's commencement with what the numbers archer us.

The existent rally is acold narrower than the header scale suggests. According to market-cap weighting information from S&P Dow Jones Indices, the 10 largest companies successful the S&P 500 present relationship for astir 40% of the full index's value. That's 1 of the highest attraction levels connected record.

Many of those companies beryllium squarely successful the AI trade:

Meanwhile, breadth crossed the broader marketplace has weakened. Roughly 410 stocks successful the S&P 500 are underperforming the scale this year, portion 234 are really antagonistic twelvemonth to date. That means conscionable a fistful of mega-cap tech names are doing astir of the dense lifting portion galore stocks softly lag behind.

Granted, concentrated enactment isn't automatically bearish. The late-1990s net roar showed however transformative technologies tin predominate returns for years. But attraction besides increases fragility. If a fewer elephantine stocks stumble, the full scale tin abruptly suffer its footing.

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