A Chinese bank employee counts 100-yuan notes and US dollar bills at a bank counter in Nantong in China's eastern Jiangsu province on August 6, 2019. - The Chinese currency steadied on August 6, a day after Beijing let the yuan weaken against the dollar, sending markets into freefall and leading the US to formally designate China a "currency manipulator". (Photo by STR / AFP) / China OUT        (Photo credit should read STR/AFP/Getty Images)
STR/AFP/Getty Images
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(CNN Business) —  

The Dow and the broader US stock market had another volatile day as Wall Street investors fear the US-China trade war will inflict broad damage on the global economy.