Meta Platforms will report third-quarter earnings on Oct. 21, a move that investors are watching closely for clues about the future of artificial intelligence spending. The report arrives as AI stocks face headwinds from economic concerns and questions about whether revenue opportunities justify current capital outlays.

For three years, AI stocks have led the bull market, pushing the S&P 500 to record highs. Companies such as Nvidia, Advanced Micro Devices, and Alphabet have seen revenue and stock performance rise significantly. However, recent weeks have brought scrutiny to the sector. If revenue does not match spending levels, analysts warn that earnings and stock performance could suffer.

Meta is the first of the "Magnificent Seven" tech companies to report this earnings season. The group includes Amazon, Alphabet, Apple, Meta Platforms, Microsoft, Nvidia, and Tesla. While Meta is best known for social media platforms like Facebook, Instagram, and WhatsApp, which serve 3.6 billion daily users, its recent strategy has shifted heavily toward AI. The company has invested billions of dollars in data centers, large language models, and AI talent.

This aggressive spending has raised concerns among some investors. Meta's capital spending-to-revenue ratio has reached approximately 35%, a metric that measures revenue reinvested into assets. Given its AI ambitions, this ratio may continue to climb. In the latest quarter, Meta's total revenue grew by 28% to $60 billion, with ad revenue accounting for $59 billion of that total.

Investors will look for two key signals in Wednesday's report: the projected growth in capital expenditure for upcoming quarters and whether current spending is translating into tangible growth. These details could provide early hints about what to expect from other major tech companies reporting in the coming days.

There are reasons for optimism regarding Meta's AI efforts. The company recently launched Muse, a personal AI agent, which has seen record download levels. While the app offers free downloads, it also provides paid subscriptions, representing an initial attempt to monetize its AI investments.

Any positive trends in Meta's results could boost its own stock and potentially lift other AI shares as investors anticipate similar news from peers. Because AI stocks play a major role in overall market movement, Meta's report could influence the direction of the S&P 500 in the days following the announcement.