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September 10, 2026 · market close

Apple's Surge Offsets a Chip Selloff That Narrows the Dow and Drags the Nasdaq 100

A concentrated slide in semiconductor names outweighed Apple's biggest points contribution of the week, leaving the major indexes lower on thin breadth.

The S&P 500 closed at 7,591.70, down 44.66 points, or 0.58%, on the day. Breadth was negative, with just 166 of the index's 500 members finishing higher, and the decline had a mixed shape: concentration sat at 54%, meaning the loss wasn't dominated by one or two names but wasn't broad-based either.

The S&P 500 through the session

The drag came almost entirely from chipmakers. Nvidia subtracted 14.31 points (down 2.37%), Micron took away 6.49 points (down 4.9%), and Intel, AMD, and Lam Research rounded out the top five detractors, each falling more than 3%. On the other side, Apple was the clear offset, adding 17.32 points on a 3.56% gain, well ahead of Alphabet's two share classes, AbbVie, and Philip Morris, which each contributed less than a point.

S&P 500 attribution map, cell size = points contributed

The Dow

The Dow closed at 52,064.00, down 316.66 points, or 0.6%. Breadth was far narrower than the S&P's here, with only 7 of the average's 30 members finishing higher.

The Dow through the session

Where the S&P's losses were chip-led, the Dow's came from a different mix. Caterpillar took off 62.76 points on a 1.29% decline, Goldman Sachs shed 53.55 points, and Amgen dropped 52.3 points on a 2.25% fall. IBM and Nvidia rounded out the top five drags. Apple again did the heaviest lifting on the other side, adding 66.75 points, with Alphabet, Disney, Microsoft, and Travelers all chipping in smaller gains. The divergence from the S&P is clear: industrials, financials, and biotech, not semiconductors, set the Dow's tone.

Dow attribution map, cell size = points contributed

The Nasdaq 100

The Nasdaq 100 closed at 29,103.51, down 318.04 points, or 1.08%, the steepest percentage decline of the three indexes. Breadth was thin at 32 of 101 members higher, and concentration ran to 93%, a narrow session by the payload's own definition.

The Nasdaq 100 through the session

Nvidia alone subtracted 174.89 points, more than half the index's total decline, with Micron, Intel, AMD, and Meta adding further drag. Apple's 223.99-point contribution nearly offset Nvidia's loss by itself, and Alphabet's two listings together added 66.19 points, with SpaceX and Microsoft contributing smaller gains. The Nasdaq's story is the S&P's chip weakness and Apple strength taken to an extreme: both the winners and losers were far more concentrated here than anywhere else in the market.

Nasdaq 100 attribution map, cell size = points contributed

The sectors

Only two of the eleven sectors finished positive. Communication Services led with a 0.58% gain, and Consumer Staples was roughly flat at 0.06%. The rest of the market fell, with Technology down 1.42%, Materials down 1.21%, and Utilities down 0.95% rounding out the weak end.

The 11 sectors by move, top contributor named

Communication Services' gain was modest in points terms, up 0.64 points, but it was the only sector with a clean positive driver of size: Charter Communications rose 4.98%, adding 0.15 points on its own.

Communication Services: what moved it

Technology was the session's clearest loser, down 1.42%, or 2.66 points, with Nvidia's 2.37% decline as the single largest drag on the sector at 0.61 points. The same chip weakness that shaped the S&P and Nasdaq 100 showed up directly here.

Technology: what moved it

None of this qualifies as a large move by the standard this note applies. The S&P 500's decline sits in the 16th percentile of the past year's sessions, the Dow's in the 19th, and the Nasdaq 100's in the 17th, all far below the 85th-percentile bar for a large move. This was a session where the direction was negative but the magnitude was ordinary, with the real story sitting in how narrowly the losses and gains were sourced rather than in their size.

The numbers

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Alphabet's Slide Drags the Dow While Meta's Caterpillar and IBM Lead a Broad Dow Rally W
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Compiled by the WMTMT attribution engine from the session's official data · built by the founders of Babylon Burns