Key Highlights

● Amplitude fell Friday as growth-oriented software stocks retreated, with no company announcement.

● SentinelOne fell sharply, days after its $1.25 billion convertible note placement.

● Higher yields added pressure; the 10-year Treasury finished near 5.1.

● Housing starts arrive Oct 20, IBM and SAP report Oct 21, Fed meets Oct 28.

Moving with its peers

Amplitude (NASDAQ:AMPL), whose software helps companies track and analyze how customers use their digital products, fell on Friday. Market commentary said the shares moved with the sector and cited no company-specific news. It grouped Amplitude with Wix.com (NASDAQ:WIX), UiPath (NYSE:PATH), SentinelOne (NYSE:S) and Commvault (NASDAQ:CVLT), all of which traded lower.

Among that group, SentinelOne fell sharply. Market commentary noted that the cybersecurity company had dropped three days earlier on a $1.25 billion private placement of convertible notes due 2031. Wix.com, UiPath and Commvault also declined in line with the broader sector.

For Amplitude, a Russell 2000 company, Friday's decline was part of a wider retreat by investors from growth-oriented software stocks rather than a response to any announcement from the company.

Software in retreat

The software selloff intensified in the afternoon. In a 45-stock software basket, 41 fell, wiping out roughly $130 billion in market value. Snowflake (NYSE:SNOW), a data-platform company often compared with analytics providers, tumbled, according to market reports. Datadog (NASDAQ:DDOG), which sells monitoring and analytics software, slid, while Okta (NASDAQ:OKTA) sank.

Behind the selling was a shift in how investors see artificial intelligence. According to market commentary, the focus moved from what AI can do to how it will be financed, with debt-funded infrastructure companies hit hardest. Goldman Sachs described hedge-fund selling as a "tactical rotation" away from smaller AI names, per a published report.

Higher yields added to the pressure on growth stocks. The 10-year Treasury yield finished near 5.1, per market data, after topping 5.30 earlier in October, the highest since 2002. A Franklin Templeton Institute investment strategist said that "pressure across the long end of the curve acts as a valuation headwind for risk assets."

The broader picture

The Russell 2000 fell 45.90 points to about 2,721, according to market data, after opening higher; another report put the close at 2,719.57. The index was nearly flat at mid-morning before the afternoon slide.

The S&P 500 lost 84.62 points to 7,659.44 and the Nasdaq Composite dropped 572.99 points to 26,140.03, while the Dow Jones Industrial Average slipped 175.28 points to 52,002.41. Investors moved into energy, utilities, consumer staples and health care, and six of the S&P 500's 11 sectors finished higher, market reports showed. The Cboe Volatility Index climbed 3.53 points to 19.99.

A market strategist said earlier in the day, "The good news is that we're starting to see a little bit of improvement in breadth."

Amplitude Awaits Enterprise Software Earnings

On the economic front, housing starts are due Oct 20 and the University of Michigan sentiment survey on Oct 23. The Federal Reserve's next decision comes on Oct 28, and Chair Kevin Warsh said, "I don't prejudge meetings." The personal consumption expenditures price index and first estimate of third-quarter GDP follow on Oct 29.

Software investors will look to next week's earnings for signs of enterprise demand. IBM (NYSE:IBM) and SAP (NYSE:SAP) report after the close on Wednesday, Oct 21, and Meta Platforms (NASDAQ:META) reports the same evening, offering a fresh read on digital-advertising and online-engagement trends. Results from larger peers often shape sentiment toward smaller software names.