Key Highlights

● The Nasdaq-100 jumped 2.28% on Wednesday.

● Three of the biggest technology companies still finished lower.

● The split shows where investors will bet on AI.

● Chips rose while software and cloud fell.

On a day when the Nasdaq-100 jumped 2.28%, three of the market's biggest technology companies still finished in the red. That divergence inside the so-called Magnificent Seven was one of the clearest signals in Wednesday's session about where investors are and are not willing to bet on AI.

Nvidia (NASDAQ:NVDA) rose 2.87% and Apple (NASDAQ:AAPL) climbed about 2% to a record finish of $355.63. Microsoft (NASDAQ:MSFT), by contrast, fell roughly 2.3%, Meta Platforms (NASDAQ:META) dropped 1.97% and Amazon (NASDAQ:AMZN) lost 1.74%.

Hardware led, platforms lagged

The split tracked a broader rotation into semiconductors. The PHLX Semiconductor index surged 5.7% on Wednesday to its highest finish since Nov. 3, with every component finishing higher, and the S&P 500 technology sector rose 3.23%. Memory and component names posted outsized gains: Micron (NASDAQ:MU) rose 11.89%, Arm 12.05% and AMD (NASDAQ:AMD) 7.32%.

Microsoft's slide came after reports said that the company may scale back partnerships with neocloud providers, the specialized data-center operators that rent out GPU capacity. That is a meaningful signal, because Microsoft has been one of the biggest buyers of outside AI compute. Reports said that a capacity delay at IREN led Microsoft to spend less than earmarked there last quarter.

One plausible reading is that investors trimmed companies that are spending heavily on AI infrastructure and bought the suppliers that receive that spending, a pattern seen in other sessions this fall.

Why the split matters for indexes

Because these companies dominate cap-weighted benchmarks, the direction of the group heavily influences index returns. On Wednesday, gains in Nvidia and Apple more than offset the losses elsewhere: the S&P 500 rose 1.31% to 7,619.38 and the Nasdaq Composite gained 1.60%. Communication services, which includes Meta and Alphabet (NASDAQ:GOOGL), rose only 0.78%, while consumer discretionary, home to Amazon and Tesla (NASDAQ:TSLA), slipped 0.05%.

The Leadership is already shifting again. Thursday morning, Nvidia was down roughly 6% to 7% premarket after reports said its board was preparing to decide whether to oust CEO Jensen Huang. Those reports have not been independently confirmed, and no board decision had been announced. Nasdaq-100 futures were off about 0.63% as of 5:26 a.m. ET.

What to Watch Next on Magnificent Seven Split

One day's split does not necessarily mark a durable regime. Microsoft, Meta and Amazon all fell on a day with relatively light volume: 14.74 billion shares changed hands versus a 20-day average of 18.68 billion, which can exaggerate moves. And the chip rally that drove the divergence is already being tested by the Nvidia headlines.

There is also a valuation backdrop. With the 10-year Treasury Yield near 5% and markets pricing roughly 85% to 90% odds of a December Fed hike, highly valued megacaps face pressure as a group, regardless of which side of the AI trade they sit on.

At the open, watch whether Microsoft, Meta and Amazon stabilize as money potentially rotates out of chips, and whether Apple holds its record. AMD CEO Lisa Su and Intel (NASDAQ:INTC) CEO Lip-Bu Tan are scheduled to speak at Yahoo Finance's Invest event from 8 a.m. ET. After the bell, Cisco (NASDAQ:CSCO) and Applied Materials (NASDAQ:AMAT) report, offering fresh reads on AI infrastructure demand, and Nvidia's own results follow on Nov. 17.