A currency trader watches monitors at the foreign exchange dealing room of the KEB Hana Bank headquarters in Seoul, South Korea, Tuesday, Feb. 6, 2018. Shares tumbled in Asia on Tuesday after a wild day for U.S. markets that resulted in the biggest drop in the Dow Jones industrial average in six and a half years. (Ahn Young-joon/AP)
Evan Horowitz, the Boston Globe's Quick Study columnist, joins us to make sense of the ups and downs in the stock market.
