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October 1, 2026 · market close

Chip Names Lift the Nasdaq 100 While Alphabet Weighs on Every Major Index

Semiconductor strength carried the S&P 500 and Nasdaq 100 to modest gains while the Dow sat nearly flat beneath a sharp internal split.

The S&P 500 closed at 7,666.45, up 14.91 points, a move of 0.19% on the day. Breadth was positive, with 291 of the index's 498 members higher. Concentration ran at 86%, the sign of an advance carried by a relatively small group of names even as the majority of the index also rose.

The S&P 500 through the session

NVIDIA added 6.90 points, the largest single contribution in the index, with Micron Technology next at 4.11 points on a 3.03% gain. Accenture, Lam Research and Applied Materials rounded out the top five. On the other side, Corteva subtracted 31.21 points on an outsized swing, while Apple shed 4.62 points and Broadcom, Alphabet's Class A shares and Alphabet's Class C shares each gave back between 3 and 5 points.

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

The Dow

The Dow closed at 50,927.00, up 20.95 points, a move of 0.04%, essentially flat even though only 14 of its 30 members advanced. That split, less than half the index higher while the price barely budged, is a clear divergence from the S&P 500's broader gain. Caterpillar did the heavy lifting, adding 92.48 points on a 1.92% rise, with Salesforce, Boeing, IBM and Travelers also contributing gains.

The Dow through the session

Amgen erased 84.64 points on a 3.38% decline, the single largest drag in the index, followed by Johnson & Johnson, Alphabet, Goldman Sachs and Disney. The gains and losses roughly offset, leaving the Dow pinned near unchanged despite sizable moves underneath the surface.

Dow attribution map, cell size = points contributed

The Nasdaq 100

The Nasdaq 100 closed at 30,501.56, up 93.06 points, a move of 0.31%, with 57 of 99 members higher. Where the S&P 500's gain concentrated in chip names, the Nasdaq 100 carried that same group with far more force: NVIDIA contributed 38.69 points, Micron 23.60, Lam Research 9.39, Applied Materials 9.21 and Synopsys 6.90 points on a 12.78% jump.

The Nasdaq 100 through the session

The index's laggards told a different story than its leaders. Alphabet's two share classes together subtracted 92.24 points, Apple gave back 25.51, Space Exploration Technologies Corp lost 24.52 and Broadcom fell 23.33. Alphabet's weight shows up as a drag in the Dow, the S&P 500 and the Nasdaq 100 alike, the one name pulling against the advance in all three.

Nasdaq 100 attribution map, cell size = points contributed

The sectors

Across the sectors, Energy led with a 1.93% gain, Technology followed at 1.09% and Industrials at 1.01%. Health Care was the day's weakest group at -1.32%, with Real Estate, Communication Services and Materials also lower.

The 11 sectors by move, top contributor named

Energy's advance was led by Marathon Petroleum, which added 0.17 points on a 6.32% move, the clearest single driver behind the sector's gain.

Energy: what moved it

Health Care's decline traced back to Johnson & Johnson, which subtracted 0.41 points on a 2.30% drop, consistent with the stock's place among the Dow's largest laggards for the day.

Health Care: what moved it

None of today's index moves register as large by this measure. The S&P 500's 0.19% gain sits at the 57th percentile of the past year, the Dow's 0.04% move at the 50th percentile, and the Nasdaq 100's 0.31% gain at the 56th percentile, all unremarkable by recent history.

The numbers

From Babylon Burns

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Compiled by the WMTMT attribution engine from the session's official data · built by the founders of Babylon Burns