Stocks wavered Monday as the S&P 500 surrendered early gains while a number of AI-linked names weighed on the market. The index finished the session about 0.3% lower after opening higher; the Dow slipped 141 points (0.3%) and the Nasdaq declined roughly 0.5%. Broadcom and Oracle were among the worst performers, each reversing earlier strength after steep weekly losses. Investors are also watching a slate of delayed economic reports this week that could set the near-term market tone.
Key takeaways
- The S&P 500 fell about 0.3% intraday after starting in positive territory, while the Dow lost 141 points and the Nasdaq dropped roughly 0.5%.
- Broadcom slid near 5% and Oracle declined more than 2% during Monday’s session; last week Oracle plunged 12.7% and Broadcom lost over 7%.
- The S&P 500 technology sector was down around 2.3% for the weekly period, reflecting pressure on AI-exposed names.
- An Amplify Seymour Cannabis ETF (CNBS) pulled back about 2% Monday after rallying 54% on Friday amid reports about possible federal reclassification of marijuana.
- Economists polled by FactSet expect November nonfarm payrolls to show a 40,000 increase—well below the 119,000 jobs added in September.
- ServiceNow was reported by Bloomberg to be in advanced talks to buy cybersecurity firm Armis (valued at $6.1 billion), a deal that could be worth up to $7 billion but may still be undone.
Background
The market’s recent swings have been driven in large part by a handful of mega-cap technology firms tied to artificial intelligence deployment and infrastructure. The so-called “AI trade” concentrated gains in a small group of stocks, amplifying index-level moves when those names retrace. Last week demonstrated that dynamic: the S&P 500 and Nasdaq finished lower while the more diversified, less tech-heavy Dow posted gains.
Investors have rotated among chipmakers, software firms and cloud leaders as traders reprice growth, margins and capital intensity against rising macro uncertainty. Corporate earnings, guidance, and merger-and-acquisition chatter are magnifying moves for individual names—turning single-stock volatility into visible index fluctuations. At the same time, calendar risk is front-and-center because key U.S. economic reports delayed by the fall government shutdown are due this week.
Main event
Monday’s session opened with modest gains but reversed as pressure built on AI-related shares and several high-profile names pulled back. Broadcom and Oracle—both big movers last week—were notable laggards, with Broadcom down roughly 5% intraday and Oracle off more than 2%. Microsoft and other large-cap tech names also registered declines, contributing to weakness in the tech sector.
Market participants pointed to last week’s heavy moves as context: Oracle’s weekly 12.7% drop and Broadcom’s over 7% slide represent some of the largest weekly shifts in those names this year. The S&P 500 tech sector’s 2.3% weekly decline highlights how sector concentration has tilted headline index performance. Traders described the action as a continuation of profit-taking and risk repricing rather than a broad liquidity shock.
Outside the AI theme, stocks tied to speculative or event-driven narratives saw sharp swings. The CNBS cannabis ETF fell about 2% after Friday’s 54% surge that followed reports a White House action on marijuana reclassification could be imminent. Meanwhile, M&A rumors lifted some enterprise software names: Bloomberg reported ServiceNow is in advanced talks to buy Armis; the potential transaction—if completed—would be among ServiceNow’s largest.
Analysis & implications
The market’s current behavior underscores two structural features: heavy concentration of returns in a few mega-caps and high sensitivity to single-stock news. When the largest names move materially, broad indices can flip direction quickly even if the majority of constituents are relatively stable. That intensifies headline volatility and can amplify flows into or out of sector ETFs and passive vehicles.
Strategically, concentration raises both opportunity and risk. Analysts emphasize operating leverage—where modest revenue growth can translate into outsized profit expansion—for the largest AI beneficiaries; that dynamic supports upside if revenue momentum persists. But concentrated leadership also leaves the market vulnerable if expectations for those specific companies deteriorate or if investors rotate to value or cyclicals.
On the macro front, this week’s delayed data—November nonfarm payrolls, October retail sales and the November CPI—are likely to be market-moving. A materially softer jobs print or surprising CPI reading could change rate expectations, which would feed back into valuations, especially for growth and AI-adjacent stocks that are sensitive to discount-rate shifts.
Comparison & data
| Index / Item | Today change | Recent weekly change |
|---|---|---|
| S&P 500 | −0.3% | Down (tech-led) |
| Dow Jones Industrial Average | −141 points (−0.3%) | Up (less tech exposure) |
| Nasdaq Composite | −0.5% | Down (tech-heavy) |
The table above summarizes intraday moves and the prior week’s directional trend. While the Dow’s outperformance last week reflected its lower exposure to AI-heavy mega-caps, the S&P and Nasdaq remain more directly tied to the performance of a concentrated group of tech names. Investors should consider both index composition and single-stock risk when interpreting headline moves.
Reactions & quotes
“It feels like everyone hates the AI trade right now. There’s no doubt about it,”
David Wagner, Head of Equities, Aptus Capital Advisors
Wagner told CNBC that despite current sentiment, he expects the largest AI-linked companies to continue leveraging revenue growth into margin expansion, supporting returns next year. He also described pullbacks as potentially healthy for sustainable rallies.
“We believe the company is in the early stages of a positive fundamental inflection,”
Morgan Stanley analysts (on Hershey upgrade)
Morgan Stanley’s note upgrading Hershey cited easing cost pressure and improving top-line trends—an example of how sector-specific dynamics can prompt analyst revisions that move single stocks independently of broader macro themes.
Unconfirmed
- The timing and content of any executive action to reclassify marijuana remain unconfirmed and were reported based on a person familiar with the matter.
- Bloomberg’s report that ServiceNow and Armis were in advanced talks is based on unnamed sources; the deal could still fall apart.
- Reports that high-level aides pushed back on Kevin Hassett’s Fed candidacy are sourced to people close to the matter and have not been confirmed by formal statements.
Bottom line
Monday’s session illustrated how concentrated leadership in a few AI-related names can flip broad-market performance in short order. While some pullbacks reflect profit-taking and position adjustments, they also reveal the sensitivity of headline indices to single-stock moves. Market participants will be watching this week’s delayed macro releases closely; harsh surprises on payrolls or CPI could reshape rate expectations and risk appetites.
For now, analysts who emphasize fundamental drivers—revenue growth, operating leverage and margin expansion—expect the largest AI beneficiaries to remain structurally advantaged, but that view depends on continued execution. Investors should weigh concentration risk, upcoming data, and company-specific news when positioning for the year-end period.