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 forecast fourth-quarter revenue and profit below estimates on Thursday, citing weak demand in China and erratic orders from customers facing uncertainty due to tariffs, sending its shares down nearly 13% in extended trading.

Shares of Applied Materials sank 13% in premarket trading Friday, a day after the semiconductor equipment manufacturer gave weaker-than-expected guidance as global economic and tariff worries impact its business,