"Market volatility experienced in the last week of 2018 has been described as something no one has ever seen before. A 700-point decline in the Dow followed by a 1000-point rise the following day followed by a 600-point decline during the day only to end up 200 points above the prior close at the end of the day. The result was a dizzying investment moment. How to understand such persistent dramatic volatility? Is cash ultimately the only safe asset?"