The final trading day of October brought heavy selling pressure to U.S. stocks, as disappointing earnings from both Alphabet and Amazon, combined with a nearly 29% single-day collapse in Intel shares, triggered a broad selloff across AI-related and technology stocks. The Nasdaq Composite plunged 2.86% on Friday and fell 5.3% for the full month of October — its worst monthly performance since March — as concerns rapidly intensified over whether massive AI investments can translate into actual profits. All four major indices closed lower on the 30th. The Dow Jones Industrial Average fell 572.25 points, or 1.09%, to 51,770.31. The S&P 500 dropped 140.32 points, or 1.82%, to 7,580.07. The Nasdaq Composite declined 747.72 points to 25,437.00.
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