Applied Materials Inc. suffered the worst single-day stock decline in five years after giving a disappointing sales and profit forecast, renewing concerns that the US trade dispute with China is weighing on demand.

Applied Materials (AMAT) stock falls after the company issued guidance that fell short of Wall Street's expectations. Warren Buffett's Berkshire Hathaway (BRK-B, BRK-A) added to its stakes in homebuilder stocks Lennar (LEN) and DR Horton (DHI).

Beijing E-Town Semiconductor Technologies , a semiconductor equipment firm backed by Beijing's government, on Wednesday said it has sued U.S. chip equipment supplier Applied Materials over alleged trade secrets infringement.

Applied Materials ( NASDAQ: AMAT) provided fourth quarter fiscal 2025 guidance that demonstrated a year-over-year revenue decline of 4.9% and an adjusted earnings per share drop of 9% during its latest financial results on Thursday.

Applied Materials was the worst-performing stock in the S&P 500 Friday, a day after the semiconductor equipment manufacturer gave weaker-than-expected guidance as global economic and tariff worries impact its business,

Applied Materials reported third-quarter revenue of $7.3 billion, beating analyst estimates of $7.22 billion. The chip equipment manufacturer reported third-quarter adjusted earnings of $2.48 per share, beating analyst estimates of $2.36 per share, according to Benzinga Pro.

The Chinese company allege Applied Materials Inc. illegally obtained, used and revealed its core technologies related to the application of plasma source in treating the surface of wafers.

This week's dividend activity included increased payouts from Cboe Global Markets ( CBOE) and Winnebago ( WGO) as well as declarations from companies such as Exxon Mobil ( NYSE: XOM) and Cisco Systems ( NASDAQ: CSCO ).