Most stock markets around the world went down on Wednesday. This happened because the U.S. made it harder to sell special computer parts, like those made by Nvidia, to other countries. These parts are used for artificial intelligence.

The S&P 500 stock index might go down by 1.2%, and the Dow Jones Industrial Average might go down by 0.6%.

The company Nvidia makes computer chips. Their shares went down by 6.3% after the market closed. This happened because the U.S. government made it harder to sell one of their chips for artificial intelligence to other countries. Another company, AMD, also makes computer chips. Their shares went down by 7.1% after the market closed.

People started worrying about a trade war again. This happened after the Trump government said they would look into important minerals that come from other countries, like rare earths. These minerals are used in things like phones and electric cars.

This morning in Europe, the main stock market in Britain, the FTSE 100, went down a little. This happened after the UK government said that prices did not go up as much in March for the second month in a row. This was mainly because gas prices were lower.

In Germany, the DAX stock market went down a little, by 0.7%. In Paris, the CAC 40 stock market also went down a little, by 0.6%.

Stock markets in China went down. This happened after the government said their economy grew by 5.4% in the last three months. This growth was good because factories made more things, people bought more, and China sold more goods to other countries. But if you compare the first three months of this year to the end of last year, the growth was slower, only 1.2%.

The stock market in Hong Kong went down 2%. But the stock market in Shanghai went up a little, 0.1%.

People who study money in private companies now think the economy will not be as good as they thought. This is because President Donald Trump recently put a 145% tax on most things from China, and China put a 125% tax on things from the U.S.

Experts at ANZ Research said business is already getting weaker this quarter.

Raymond Yeung and other researchers said that businesses were worried because they did not know what would happen with the taxes. It was not just because of the taxes themselves. President Trump's words changed how businesses felt and what they did.

In Tokyo, the Nikkei 225 stock index went down by 1% to 33,920.40. This happened because the shares of big technology companies like Advantest and Disco Corp went down a lot.

Stock markets went down a little. South Korea's market dropped by 1.2%, and Australia's market dropped just a tiny bit.

The stock market in India stayed almost the same, and the market in Bangkok went down a little.

On Tuesday, US stock prices changed a little. The S&P 500 went down by 0.2%, and the Dow went down by 0.4%. The Nasdaq composite also went down a very small amount.

People were not sure about President Trump's taxes on foreign goods, so investors waited to see what would happen.

The U.S. bond market seemed calmer after big changes last week made people less sure that U.S. government bonds were a safe place for their money.

The interest rate on a 10-year government bond stayed at 4.33%. This was lower than before, and it made people feel less worried.

The U.S. dollar stopped falling after it dropped a lot last week. People are now more worried that Trump's trade problems could make it less safe to invest in.

Palantir's stock went up again today, by 6.2%. This is because NATO will use the company's AI technology.

On Wednesday morning, the price of oil in the U.S. went down. It lost 69 cents and was $60.64 for one barrel. The price of oil in other countries also went down. It fell by 65 cents and was $64.01 for one barrel.

Trump's taxes on goods have made people think economies will not grow as quickly, so they need less oil and other materials.

The U.S. dollar went down a little against the Japanese yen. The euro went up a little against the dollar.