Apple (AAPL)

Apple stock looked set to compound losses on Friday when the market opens, as investors worry about sales growth for the current quarter. On Thursday, the iPhone maker said it was expecting low- to mid-single-digit sales growth for the quarter.

The revelation comes after quarterly earnings for September that showed a rebound in iPhone sales.

Market watchers are also worried about slowing revenue in China as competition in the mobile market hots up.

Apple stock is still up 21.7% for the year-to-date, almost on par with gains from Nasdaq (^IXIC).

Amazon (AMZN)

Amazon stock stormed more than 7% higher in premarket trade on Friday after a third-quarter earnings report that beat estimates. The move higher came after the tech giant said it was beginning to see benefits from its AI operations.

Adjusted earnings per share were $1.43, beating the analyst consensus of $1.14. Revenue for the quarter came in at $158.9bn, topping estimates of $157.3bn and marking an 11% increase year-on-year.

While the report saw Amazon on sure footing, it also pointed to a huge increase in capital expenditures on data centres and networking equipment associated with AI. Amazon is set to spend $75bn this year, and more in 2025, in its bid to be dominant in AI.

In its report it touted the expansion of Rufus, its generative AI shopping assistant, which is serving several new countries.

Microsoft (MSFT)

Microsoft stock staged a small recovery on Friday in premarket trade, having lost 6% on Thursday after its earnings report.

The report indicated that delayed shipments of GPUs (AI chips, or graphics processing units) from “third parties” weighed on its guidance for its AI cloud business in the current quarter.

Microsoft primarily uses Nvidia’s GPUs in data centres to power its AI software.

“Microsoft said they are not meeting current demand because they can’t get data centres up in time, which could indicate they are not getting the NVDA chips they depend on in time to support their customers,” D.A. Davidson analyst Gil Luria told Yahoo Finance.

Stock lost ground despite beating analyst expectations. Its revenue from Azure and other cloud services was up 33%, surpassing estimates.

Nvidia (NVDA)

Nvidia regained a bit of lost ground in premarket on Friday, having seen 4.7% wiped off its market share on Thursday. Stock was up 1.4% in premarket. Over the past five days, the stock has fallen more than 5%.

Investors are nervous as the chipmaker's big peers and clients report results, giving a fresh read on the appetite for AI tech and infrastructure. Fears of a slowdown in AI spending would hurt the Nvidia's top and bottom lines.