According to Reuters, U.S. stocks closed sharply lower on Friday (10/30), with the Nasdaq falling 2.9%—its largest single-day percentage drop since June 5. The catalyst was earnings reports from Intel and Amazon, which reignited doubts over whether massive spending on artificial intelligence will pay off.
What Dragged Wall Street Down on Friday?
According to Reuters, the three major U.S. stock indexes finished in negative territory, with the tech-heavy Nasdaq taking the heaviest blow. The decline was triggered by quarterly results from Intel and Amazon released late Thursday, and it quickly spread across the semiconductor and server-manufacturing sectors. Amazon managed to pare some of its losses during the session, but Intel did not.
The breakdown of the sell-off shows where the pain was concentrated. Based on figures reported by Reuters, the closer a company sits to AI hardware, the steeper the drop:
Intel was an extreme case, with the stock plunging nearly a third in a single session. What alarms the market, however, is the contagion effect: Nvidia, which typically acts as a compass for the sector, dropped "only" 4.2%, yet the broader chip index still lost 7.2% on the day. When server makers like Dell and HP also slide close to 10%, the takeaway is that the issue is not isolated to a single company—it is the bill for AI.
How Severe Is the Drop? The Record High Perspective
One bad day does not make a trend, which is why the distance from the peak matters more than the daily percentage. According to Reuters, the Nasdaq is 7.8% below its record close of October 6—meaning that in less than a month, the index has given up nearly eight percentage points of its previous gains. Meanwhile, the chip index has accumulated a monthly loss of over 15%.
To look at the scale in index points, our Nasdaq page recorded the Nasdaq 100 at 28,384.85 points during the session, with a daily decline of 3.46%. Note that this figure does not match Reuters' 2.9%: these are different measurements from different sources, but the order of magnitude is what counts—a drop of nearly 3% to 3.5% in an index of this size is an unusually large move.
Nor is this the first time recently. Last week, we covered why the Nasdaq fell 2.60% and tech stocks tumbled following an AI warning from Meta. The pattern repeats: with every tech giant's earnings report, the market reopens the exact same debate.
What Does Artificial Intelligence Have to Do with It?
Tech companies have been pouring enormous sums into chips, servers, and data centers to train and run AI models. As long as earnings remained strong, no one questioned the spending. Weaker results from two central players in this supply chain prompted the market to ask when that money will start flowing back. As Oliver Pursche told Reuters:
“It’s fair to say that this week, and not just today, has revolved around the future of AI, what it looks like, whether there will be a positive return on investment, and if so, how quickly.”Oliver Pursche, quoted by Reuters
This quote explains why the pullback was so broad-based. The risk highlighted is not that "AI has failed," but rather that "stock prices had already priced in a quick return." When valuations are already high, any signal that returns will take longer depresses multiples. This cautious behavior also appears outside of Big Tech: we have previously reported on how banks are cutting AI spending due to a lack of returns.
Does Brazil Get Caught Up in This?
The same reporting notes that the Ibovespa dropped 18.12% on the week, its largest decline since 2020 and its fifth-largest since the Plano Real, amid a backdrop described as highly uncertain due to fiscal concerns for next year. In other words, Brazilian investors faced a squeeze from two fronts: domestic fiscal pressures and external pressure from U.S. tech stocks. We explored the domestic side in why the Ibovespa plunged 18.12% during the week.
The contagion mechanism is well known: when U.S. tech stocks melt down, global risk appetite shrinks, and emerging markets usually feel the impact as capital flees volatile assets first. Sources do not specify how much of the Ibovespa's drop originated in New York, so assigning an exact weight is not possible—but it is clear that these two pressures compound rather than cancel each other out.
Investors holding S&P 500 or Nasdaq ETFs, or tech BDRs, saw their portfolio values decline across the board. The benchmark S&P 500 also lost ground, although sources did not provide its exact percentage drop. According to the reporting, the root cause is specific—earnings reports and the cost of AI—rather than a generalized market collapse. That does not mean the sell-off is over, nor that it will continue. For steady, long-term investors, the key takeaway is to check how concentrated their portfolio is in U.S. technology: that is precisely the slice hit hardest by Friday's events.
What to Monitor Going Forward
Without a crystal ball, the best approach is to track the key metrics provided by the underlying reporting:
The October 6 record high — the Nasdaq sits 7.8% below it; if that gap narrows, the shock was temporary; if it widens, the market is actively repricing AI.
The chip sector — down more than 15% for the month and 7.2% on Friday; until the chip index stops falling, contagion risks for the rest of the tech sector remain wide open.
Intel following its -28.6% drop — if the stock stabilizes or if upcoming earnings from other companies follow the same script, the warning regarding AI returns will gain further weight.
U.S. interest rates — Federal Reserve decisions directly impact appetite for expensive equities; see how the Nasdaq reacted when the Fed delayed rate cuts.
The Verdict: Reuters describes a downturn with an identifiable cause—weak earnings from Intel and Amazon alongside questions surrounding AI investment returns—rather than motiveless panic. The Nasdaq pulled back 2.9% and sits 7.8% below its peak. It serves as a sign that the market has grown less tolerant of AI promises, and whether to take action depends entirely on how much of your portfolio is exposed to this bet.
