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US stock market movers today: US stocks rose on Monday, October 20, as major indexes kicked off a new week of trading, boosted by optimism over strong product demand and upcoming corporate earnings, as per a report. The S&P 500, Dow, and Nasdaq each gained more than 1%, as investors prepared for a busy week of earnings reports and key inflation data, as per an Investopedia report.

Here's a look at the top stock gainers and top stock losers in the US stock market today October 20.

Apple Stock Jump Nearly 4% on Strong iPhone 17 Sales

Apple shares jumped nearly 4% to a record close after a report pointed to robust demand for the company’s new iPhone 17 series in the US and China, as per the report. Counterpoint Research said sales of the latest model over its first 10 days on the market outpaced those of its predecessor, underscoring strong consumer interest in Apple’s flagship product, as reported by Investopedia.

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Super Micro Computer Stock Gains 5.5% Amid Bullish Technical Setup

Super Micro Computer shares rose 5.5% after a technical analyst suggested the stock could be forming a bullish “cup and handle” pattern, as per the Investopedia report. The server maker, known for its exposure to artificial intelligence infrastructure, has been under pressure in recent months after missing sales and profit forecasts in its most recent earnings report, as per the report.

Energy Stocks Surge as Natural Gas Prices Climb

Energy stocks also advanced, helped by a rise in natural gas prices. Forecasts for colder weather boosted expectations for higher heating demand in the coming weeks, as per the report. Expand Energy shares surged 6%, making it the top performer in the S&P 500 on Monday, while EQT Corp gained nearly 5%, as per the Investopedia report.

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AppLovin Stock Falls 5.6% on Regulatory Concerns

AppLovin shares fell 5.6% following reports of growing regulatory scrutiny over the company’s data-collection practices, as per the report. The adtech firm has been under investigation by the Securities and Exchange Commission, according to earlier reports, contributing to recent pressure on the stock.

Oracle Stock Extend Decline, Falling Nearly 5%

Oracle shares sank nearly 5%, extending last week’s losses after the company set ambitious growth goals during its Oracle AI World conference in Las Vegas, as per the Investopedia report. While Oracle emphasized plans for AI-driven expansion, several Wall Street analysts voiced concerns about its rising capital expenditures and dependence on revenue linked to OpenAI, as per the report.

Seagate Stock and Western Digital Stock Decline on AI Cycle Concerns

Shares of hard disk drive makers Seagate Technology and Western Digital also declined, slipping 4.9% and 3.7%, respectively, as reported by Investopedia. Analysts at UBS recently increased their price targets for both companies but maintained “neutral” ratings, noting that while demand for AI-related infrastructure is strong through 2026, it could face a potential cyclical slowdown in 2027, as per the Investopedia report.

FAQs

Why did US stocks rise today?
Major indexes climbed as investors grew optimistic about strong product demand and upcoming corporate earnings.

Why is Oracle’s stock declining?
Investors grew cautious after the company set ambitious AI growth targets that raised spending concerns.