Due to the outbreak of a new coronavirus in Wuhan, China - a city of 11 million 521 miles west of Shanghai - economic contagion is already rippling through Asia.
Tourism has been slashed, retail outlets closed on scale, service workers encouraged to work from home, and supply chains disrupted. Some are even suggesting Xi Jinping's important state visit to Japan this spring could be put on hold.
Consider that Delta Airlines has suspended flights to mainland China until the end of April. At least 90 days of no flights meaning at least 90 days of new business put on hold.
The smart money on Wall Street tracks air traffic between the US and China as a KPI to determine where the economy is going.
With this Black Swan event to open the Year of the Rat, plan for 2020 to see little global economic expansion.