Call me old fashioned but it's a nice change of pace to see news about traditional market indexes crashing rather just crypto currencies.
There’s a lot more room to go down.
The volatility index has a very sudden spike at the end of the market
https://www.bloomberg.com/gadfly/articles/2018-02-05/stock-i...
Thought that happened in December, not February. A short year for traders this year, I guess.
(unintentional pun)
Edit: One of the more interesting and notable causes is that many fund managers and investment advisors will actually rebalance portfolios so that at years end it appears they were holding the biggest winner stocks/assets. Basically a marketing trick.