Investors are weighing the likely impact of the first US shutdown in seven years, which puts hundreds of thousands of jobs and billions of dollars in output at risk.

Stocks were set to open lower on Wednesday as the US government officially entered a shutdown and Wall Street grappled with the uncertain implications for the economy.

Follow all the latest U.S. market action for Wednesday here to see if stocks can retain their poise amid the uncertainty of a government shutdown.

Investors have typically been unfazed by government closures, but the longer a shutdown runs, the greater the chance of longer-lasting effects.

Major tech stocks, including Apple, Alphabet, Meta Platforms, Amazon, and Nvidia, saw modest declines of up to 0.4% in premarket trading. Meanwhile, some companies gained sharply. Nike shares jumped roughly 3% premarket after reporting unexpected first-quarter revenue growth.

Although painful for federal workers, travelers, and thousands of people and businesses in and outside Washington that partner with the US government, shutdowns typically aren’t significant events for the stock market or the economy.

U.S. equities have performed well in September, despite it typically being a tough month for stocks. Yet a potential government shutdown now looks likely to hit midweek, right as investors will be closing out the month and quarter. Importantly, a shutdown could interrupt the release of September’s all-important jobs report.

The government shutdown has begun. And it’s plunging the U.S. into a fresh cycle of uncertainty. President Donald Trump and Congress failed to strike an agreement to keep government programs