The Dow Jones Industrial Average began the week’s opening session stumbling as it fell over 150 points due to trade negotiations between the United States and China stalling. In addition, the new tariffs imposed by China took effect today as both economic superpowers don’t appear to be relenting in this ongoing trade dispute.

In addition to the Dow, the S&P 500 fell 15 points while the Nasdaq Composite dropped over 30 points as of 11:45 a.m. ET. Combined, DowDupont Inc and Johnson & Johnson helped to bring the Dow down by 3.7%.

“One of the bigger risks with these tariffs going into effect is that the United States may be pushed out of the Chinese market and it is a growing market,” said Scott Brown, chief economist at Raymond James in St. Petersburg, Florida.

In the latest round of tariffs, U.S. President Donald Trump announced he would be move forward with imposing a 10% tariff on $200 billion worth of Chinese goods that includes a step-up increase to 25% by the end of the year. The new round of U.S. tariffs on 10% of Chinese goods signals that the U.S. won’t relent on the application of pressure to force China’s hand in making a deal when actual negotiations materialize.

The list of goods affected by the new round of tariffs was apparently modified by the White House, which removed about 300 goods from an initial list that included smart watches, certain chemicals, bicycle helmets, high chairs, and other goods.

Despite this, it took less than 24 hours for China to respond to the latest salvo of tariffs fired off by U.S. President Donald Trump as Beijing announced it will impose $60 billion worth of tariffs on U.S. goods, which took effect today. The new round of tariffs from China are said to affect a list of 5,207 products within a range of 5 to 10%. Both the U.S. and China have already slapped each other with tariffs worth $50 billion total.

Last week, the U.S. capital markets were able to stave off any negative effects of trade wars as the S&P 500 hit new highs, but they appear to have returned to roil the markets further.

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