(Bloomberg) -- For about a year, investors have bid up megacap tech shares on the theory that their exposure to artificial intelligence will usher in a new era of elevated growth and efficiency. Now the companies need to prove it.

Microsoft Corp. and Alphabet Inc., two of the biggest players in AI-related software, will report after the market close, and Wall Street wants a stronger sense of when the rally-driving technology will start moving the needle for earnings and revenue. Both stocks have been supported by AI excitement; Microsoft is above a historic $3 trillion valuation, while Google’s parent company returned to all-time highs.

“AI might facilitate growth over the foreseeable future, but I’m not sure most big tech stocks have much to show for it yet,” said Dan Taylor, who oversees about $40 billion as chief investment officer of Man Numeric. “Any clarity they give about the likely impact over 2024 or 2025 will be crucial. Expectations are very high, and if the outlooks don’t support that, then we could see some issues with the stocks.”

Microsoft slipped 0.5% on Tuesday while Alphabet dropped 1%. The Nasdaq 100 Index dropped 0.7%.

The stakes are especially high for Microsoft, which trades at an elevated multiple and has rolled out AI-supported assistant services related to its OpenAI investment. Last quarter, its results highlighted the increasing impact AI had on growth in its Azure cloud business and investors will be looking for a repeat performance — or better. 

Both stocks are among the so-called Magnificent Seven that have led the market’s advance. They are up 70% since the end of 2022, including gains of nearly 9% in January. The Nasdaq 100 Index is up less than 5% this year.

Expectations are high for AI-related growth. UBS Group AG forecast $420 billion in AI revenue by 2027, up from $28 billion in 2022, and it said AI “could arguably be the tech theme of the decade, as we don’t see similar growth profiles elsewhere.”

Both Microsoft and Alphabet are seen at the cutting edge. In addition to Microsoft’s Copilot assistant products and AI lifting demand for cloud computing, Alphabet recently released its Gemini AI model, easing concerns that it has fallen behind OpenAI’s ChatGPT. Alphabet’s results were seen as a disappointment last quarter, especially with its cloud business.

The upcoming reports are expected to reflect healthy growth for both companies. Revenue at Microsoft is seen rising about 16%, while Alphabet’s comes in at about 12%. However, consensus expectations for the quarter have barely changed for either over the past three months, according to data compiled by Bloomberg, suggesting that the excitement over AI isn’t translating to improved near-term expectations. 

For Microsoft, “this is a year of laying the foundation for GenAI adoption, as we are still taxiing toward the runway, with actual M365 takeoff likely closer to 2025,” JPMorgan Chase & Co. analysts wrote, referencing the company’s family of productivity software. Citigroup calculates $7 billion in Office Consumer Copilot monetization by Microsoft’s 2026 fiscal year; the company made about $212 billion in total revenue last year.

Should Microsoft indicate that an inflection from AI is further out than Wall Street is anticipating, that could put pressure on the stock. Shares trade above 33 times estimated earnings, their highest in about two years, and well above the 10-year average below 24. The Nasdaq 100 Index has a multiple of 26. Alphabet’s multiple is lower, at 21 times, but this represents a slight premium to its long-term average.

“AI is something we’re trying to get a handle on, since even if it is transformative, translating that to products and profits is challenging, and we’re trying to figure out the drivers of growth going forward,” said Michael Rosen, chief investment officer at Angeles Investments. 

“I think these are solid companies that have proven their ability to generate very strong profitability over a very long period of time, but given the run we’ve had, it wouldn’t surprise me to see markets selling on the earnings, even if the news is good.”

Tech Chart of the Day

Tech stocks have rallied nearly 25% from their October low, resulting in the Nasdaq 100 adding more than $4 trillion in market value. The rally has been partly fueled by the rising earnings estimates for the tech-heavy benchmark. Analysts on average have continued to raise earnings estimates for tech firms as the largest mega-caps gear up to report results this week.

Top Tech Stories

  • Elon Musk said that the first human patient has received a brain implant from his startup Neuralink Corp., a significant step forward for the company that aims to one day let humans control computers with their minds.
  • International Business Machines Corp. delivered a companywide ultimatum to managers who are still working remotely: move near an office or leave the company.
  • The once-hot logistics startup Flexport Inc. plans to lay off hundreds of workers, according to a person familiar with the matter — the company’s latest effort to reposition itself during a global shipping industry slowdown.
  • TikTok is testing a feature that could make all posts shoppable, the social media company’s latest move to create a multi-billion-dollar US e-commerce business.
  • Chip equipment maker J.E.T. Co.’s shares have more than doubled since their September debut in Tokyo, bolstered by expectations that US and Japan initiatives to boost semiconductor prowess will propel sales.
  • Deal makers are turning to artificial intelligence and generative AI tools to source data, screen targets and conduct due diligence at a time of heightened regulatory concerns around mergers and acquisitions, Bain & Co. said in its annual report on the industry released Tuesday.

Earnings Due Tuesday 

  • Premarket
    • Corning
    • CommVault
  • Postmarket
    • Microsoft
    • Alphabet
    • AMD
    • Electronic Arts
    • Match Group
    • Skyworks
    • Teradyne
    • Manhattan Associates
    • Juniper
    • Littelfuse

--With assistance from Subrat Patnaik and Michael Msika.

(Updates to afternoon trading.)

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