Minnesotans can relate to the coronavirus crisis in these terms: We are in the financial equivalent of driving in a blizzard.
Sure, the newest cars have all kinds of new technology to keep us on the road in these conditions, the anti-lock brakes, stability control, collision avoidance and all-wheel drive, but if things get bad enough, the only solution is to drive more slowly until either the storm lets up or we have to stop.
For the financial markets, coronavirus has reduced our visibility to next to nothing. The circuit breakers have kicked in, the Fed is cutting rates and buying paper, but, like our car's gadgetry, there is little that can be done until the blizzard clears and we start getting enough information for the markets to function properly.
The black swan
The term black swan refers to an event that was previously thought to be nearly impossible. In the second century, black swans had never been seen and were assumed to not exist.
However, in 1697 black swans were discovered in Australia. Black Swan Theory describes very rare and highly consequential events that are impossible to predict. The coronavirus is the ultimate black swan. Although pandemics are known to exist, did you or any financial expert that you know of think a virus from China would take down the longest bull market in history?
Information is critical
The price of an individual public company's stock is typically based on a large and continually updated set of publicly available information regarding the company's business. The most critical aspect of this information (called "guidance") relates to forecasts of future business conditions: Sales, costs and future expected profits and losses.
Many large companies themselves provide this guidance and there exists an army of stock analysts whose job it is to forecast future stock prices based on this and other information. Currently, a lot of this information is either not available (because the company has withdrawn its guidance, which has happened a lot recently) or is unreliable (how many people are going to take cruises in September?).
The coronavirus is a stock market blizzard: Until visibility improves, the stock market will be extremely volatile and could easily sell off further.