Nvidia, Microsoft and Meta supplied nearly half the S&P 500's gain against multiyear-high yields

Weight times return gives the split. Nvidia's 8.5% of the S&P 500 at Friday's close, multiplied by its 2.1% gain, comes to about 0.18 percentage points ^[11][3][21]. Microsoft's 5.8% weight and 1.5% gain add about 0.09, and Meta's 2.4% and 1.9% add about 0.05 ^[21]. That totals roughly 0.31 points of a 0.66% day, or 47% ^[1][22].

Take those points out and the remaining 83% of the index added about 0.35 points, a weighted average gain near 0.42%, against an average of nearly 1.9% for the three ^[13][23]. The weights are Friday's closing figures, so both numbers are approximate ^[11]. On a cap-weighted count, the rest of the market rose on Monday as well.

"Here, I think there's tremendous distortion caused by some very big winners, namely Nvidia, Microsoft and Meta," Cramer said ^[9]. His charitable trust, the portfolio run by CNBC's Investing Club, owns all three ^[10]. The numbers back him on concentration. Neither report gives sector returns, so the losses he describes under the index cannot be checked from Monday's figures. "We have so many stocks of so many companies that can't rally until interest rates reach a level where selling bonds is plain stupid," he said ^[15].

Cramer said lower oil would typically ease inflation worries and take pressure off yields, a pattern that had held since the Iran war broke out ^[8]. On Monday it broke. Quartz tied the climb in yields to worry that stubborn inflation will keep the Federal Reserve at restrictive levels, after a quarter-point increase at its September meeting ^[5][17]. Cramer offered three possible causes for the bond selloff: the government's borrowing needs, demand for money to fund data center projects, and hedge funds shorting bonds ^[12].

The second cause connects the two markets. Cramer credits Nvidia's run partly to the returns its chips earn customers such as SpaceX, which rents out computing capacity from its Nvidia-powered clusters ^[19]. SpaceX itself led the Nasdaq's advance with a gain of about 5%, according to Quartz ^[7]. If data center financing is part of what pushes yields up, the AI spending behind Monday's biggest gainers is also adding to the rate pressure on everything else.

There are a couple of ways out. Yields can stall and let income stocks catch up. Citi leans that way: strategist Beata Manthey noted world equity markets are up around 12% this year and said the firm remains in the "resilience" camp for now ^[20]. "Does this relative calm suggest equity fundamentals will prove resilient to ongoing macro shocks, or will stocks eventually need to correct to more accurately reflect the current risk backdrop?" Manthey wrote ^[18]. Or yields keep rising until three stocks can no longer offset the drag on the other 83%.

In my view concentration is the solid finding and the hidden damage is the weaker one, because on the one day measured the rest of the index went up. If sector data shows utilities and safety stocks falling while the index rose, the 0.42% is a cap-weighted average covering losses, and Cramer is right. He is betting on the bond market. "The only conclusion: the bond sellers so far have been anything but stupid," Cramer said. "My money's on them to tell us where we're going next." ^[16]