Traders work after the closing bell at the New York Stock Exchange (NYSE) on August 7, 2019 in New York City. - Wall Street stocks finished little changed on August 7, 2019, following a choppy session as a plunge in treasury bond yields early in the day underscored worries about a weakening global economy. (Photo by Johannes EISELE / AFP)

Traders work after the closing bell at the New York Stock Exchange (NYSE) on August 7, 2019 in New York City. - Wall Street stocks finished little changed on August 7, 2019, following a choppy session as a plunge in treasury bond yields early in the day underscored worries about a weakening global economy. (Photo by Johannes EISELE / AFP)

Traders work after the closing bell at the New York Stock Exchange (NYSE) on August 7, 2019 in New York City. - Wall Street stocks finished little changed on August 7, 2019, following a choppy session as a plunge in treasury bond yields early in the day underscored worries about a weakening global economy. (Photo by Johannes EISELE / AFP)

Traders work after the closing bell at the New York Stock Exchange (NYSE) on August 7, 2019 in New York City. - Wall Street stocks finished little changed on August 7, 2019, following a choppy session as a plunge in treasury bond yields early in the day underscored worries about a weakening global economy. (Photo by Johannes EISELE / AFP)

Traders work after the closing bell at the New York Stock Exchange (NYSE) on August 7, 2019 in New York City. - Wall Street stocks finished little changed on August 7, 2019, following a choppy session as a plunge in treasury bond yields early in the day underscored worries about a weakening global economy. (Photo by Johannes EISELE / AFP)

Traders work after the closing bell at the New York Stock Exchange (NYSE) on August 7, 2019 in New York City. - Wall Street stocks finished little changed on August 7, 2019, following a choppy session as a plunge in treasury bond yields early in the day underscored worries about a weakening global economy. (Photo by Johannes EISELE / AFP)

Traders work after the closing bell at the New York Stock Exchange (NYSE) on August 7, 2019 in New York City. - Wall Street stocks finished little changed on August 7, 2019, following a choppy session as a plunge in treasury bond yields early in the day underscored worries about a weakening global economy. (Photo by Johannes EISELE / AFP)

Traders work after the closing bell at the New York Stock Exchange (NYSE) on August 7, 2019 in New York City. - Wall Street stocks finished little changed on August 7, 2019, following a choppy session as a plunge in treasury bond yields early in the day underscored worries about a weakening global economy. (Photo by Johannes EISELE / AFP)

Traders work after the closing bell at the New York Stock Exchange (NYSE) on August 7, 2019 in New York City. - Wall Street stocks finished little changed on August 7, 2019, following a choppy session as a plunge in treasury bond yields early in the day underscored worries about a weakening global economy. (Photo by Johannes EISELE / AFP)

Tourists walk past the New York Stock Exchange (NYSE) on August 7, 2019 in New York City. - Wall Street stocks finished little changed on August 7, 2019, following a choppy session as a plunge in treasury bond yields early in the day underscored worries about a weakening global economy. (Photo by Johannes EISELE / AFP)

Tourists walk past the New York Stock Exchange (NYSE) on August 7, 2019 in New York City. - Wall Street stocks finished little changed on August 7, 2019, following a choppy session as a plunge in treasury bond yields early in the day underscored worries about a weakening global economy. (Photo by Johannes EISELE / AFP)