China's stock markets stumbled badly on the first day of trading in 2016, with a 7 percent plunge forcing a market shutdown. The trigger mechanism that cut the day short in Shanghai and Shenzhen was created in response to last year's market crash, which brought trillions in losses.

Ripple effects from the Chinese plunge were felt around the world. Major markets in Europe dropped, with Germany's DAX down more than 4 percent at one point Monday. In the U.S., the Dow Jones industrial average closed the day down by 276 points, or 1.6 percent. The S&P 500 and the Nasdaq also finished lower.

NPR's Frank Langfitt reports on the situation in China:

"The massive sell-off followed the release of data showing parts of the Chinese economy are continuing to contract. A private survey showed China's factory activity shrank in December for the 10th month in a row. On Friday, a government survey showed a fifth month of contraction regarding larger, state-owned companies."China's economy is still growing at a rate that would be the envy of most countries, but that growth has been slowing more rapidly than many anticipated."

After Monday's fall, the Shanghai Composite Index, which had soared to 5,178 points last June, now stands at 3,296. Compare that with the first day of trading in 2015, when it closed at 3,350.

Trading was halted before 2 p.m. local time. In addition to poor economic indicators, some analysts cite a rush to sell off stock after an initial drop, as investors feared the market might close early.

Also blamed for the volatility: the expiration this Friday of a six-month trading ban instituted after last summer's free fall. That ban forbade large investors and insiders to sell their stakes in companies in an attempt to prop up the market. The ban applies to investors holding 5 percent or more of a company's shares.

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