How worried should we be about COVID-19 and the economy?

Phew, OK, wow. Like the markets this morning, let’s trip our own “circuit breaker” to recalibrate and talk through everything that just happened with stocks and oil. Plus, we’ll look to Austin, Texas, where residents and businesses are reeling from the cancellation of SXSW, and to Shanghai, where people are ever-so-slowly getting back to work and shopping.