Dow Jones | Nasdaq | Stock Market Highlights: US stocks tumble as disappointing results from Intel and Amazon deepen concerns over rising AI spending and uncertain returns. The Nasdaq suffers its biggest single-day percentage drop since June 5, while the S&P 500 and Nasdaq end October lower. The Dow, however, posts a monthly gain. - Oliver Pursche, senior vice president at Wealthspire Advisors in New York

- Joe Tigay, portfolio manager at Equity Armor Investments - Gene Goldman, chief investment officer at Cetera - Ipek Ozkardeskaya, senior analyst at Swissquote Bank