Stock Markets Hit 'Triple High' For The First Time Since 1999

Stock markets in the U.S. had a blockbuster day Thursday, with the S&P, Dow and Nasdaq all closing at record highs. It is the first "triple high" since 1999.

Here & Now's Jeremy Hobson speaks with Bloomberg Gadfly's Michael Regan about what's behind the big day for stocks.

Michael Regan, columnist for Bloomberg Gadfly. He tweets @Reganonymous.