Analysts are watching the ‘Yiwu Index’ for a clue about who will prevail in the all-important poll between Vice President Kamala Harris or former president Donald Trump. Yiwu, which is in China's Zhejiang Province, is one of the country’s most popular wholesale markets. Its proponents claim that sales of Trump’s merchandise in 2016 outstripping his then opponent Hillary Clinton accurately predicted the race for president. However, some say it may no longer be an accurate barometer – if it ever was