Nvidia and Broadcom Rebound Can't Mask Apple's 2.7% Slide as AI Doubts Leap From Seoul to Silicon Valley

A handful of chipmakers staged a comeback on Tuesday, but the recovery was too narrow to lift the Vanguard FTSE All-World UCITS ETF USD Accumulation (ISIN IE00BK5BQT80) out of its recent holding pattern. Nvidia climbed 2.9%, Broadcom added 3.8% and AMD jumped 5.5% — yet Apple fell 2.7% after warning that rising memory-chip costs are set to squeeze margins. That split screen captures precisely why a fund holding thousands of companies worldwide still trades at the mercy of a few technology heavyweights.

The ETF last changed hands at €168.20, roughly 5.2% above its 200-day moving average — a technical signal that the medium-term uptrend has survived the recent turbulence.

Asia Feels the Chill First

The unease radiating from Wall Street reached Asian markets before European investors had finished their coffee. South Korea's Kospi tumbled 4% and Taiwan's Taiex dropped 3.8% on Tuesday, with AP tying the selloff directly to fears that the enormous sums technology giants are pouring into AI data centres may never earn an adequate return. Because the Vanguard fund tracks global equities including Asia, that shift in sentiment lands on its doorstep immediately.

Monday's US session had set the tone. The Nasdaq Composite shed 1.1% and the S&P 500 gave up 0.5%, AP reported — and in a telling detail, most S&P 500 constituents actually rose. What dragged the index down was Nvidia, which surrendered early gains and turned negative.

A Pattern of Narrow Leadership

That same dynamic has repeated itself with striking regularity. On 29 October, Alphabet suffered its largest single-day decline on record after growth came in weaker than expected, and the Nasdaq fell 1.4% even as the majority of S&P 500 stocks advanced. AP read the reaction as fresh evidence that investors doubt whether Alphabet's sprawling AI investments will pay off.

The scepticism had been building for weeks. Reuters reported that investors were increasingly questioning whether the infrastructure spending of the tech titans could keep pace with near-term earnings power, and the Nasdaq lost 5.3% over October as a whole. Disappointing quarterly results from Alphabet, Amazon and Intel fed the mood, with the MSCI World index slipping after an initial advance.

Concentration explains the outsized reaction. Technology accounts for roughly 38% of the S&P 500, Reuters noted — a weight that makes any disturbance in the sector reverberate through broadly diversified products like this one. October illustrated the disparity: the S&P 500 technology sector fell 6.8% for the month, while nine of the index's eleven sectors gained and the benchmark itself dipped only slightly.

Oil Adds a Second Storyline

Markets were juggling more than one narrative. Brent crude plunged 7.6%, AP reported, buoyed by hopes of possible peace talks between the United States and Iran — a reminder that the AI debate is not the only force moving prices.

Earlier in the cycle, a technology-driven selloff had already knocked the S&P 500 down 1.8% and the Nasdaq Composite down 2.9%, triggered in part by Intel's weaker-than-expected profit forecast and worries about stretched AI valuations. Asian technology-heavy markets came under pressure then too.

Where the ETF Stands

At €167.40, the fund sits 3.8% below its 52-week high of 7 October but remains roughly 20% above its low from late November last year. On that reading, the swings of recent days look more like consolidation after a strong year than a fundamental breakdown.

For holders, the picture cuts both ways. Concentration in a few US technology names means a single disappointing quarter or a fresh wave of doubt about AI profitability can drag the entire index. Yet measured by the number of individual stocks moving higher, the broad market is sturdier than the headlines suggest.

Reuters flagged the looming US midterm elections, further corporate earnings and the October jobs report as the next tests for an already jittery market. Whether nerves over AI spending harden into something more durable — or the chipmakers' rebound proves to have legs — should become clearer in the weeks ahead.