Breakingviews: Long-term investors will be tested by Trump and his unsettling Twitter tactics

Tom Buerkle
Donald Trump
Jonathan Ernst | Reuters

It will take some resolve for the Trump rally to persist. After a brief plunge in overnight trading after the presidential election victory by the New York real-estate mogul, U.S. stocks have been on a tear. Donald Trump, however, keeps chiseling away at bedrocks that underpin capitalism and free markets.

Ahead of the Nov. 8 ballot, there were widespread fears over what the mercurial Trump would mean for equities. Instead, in the dozen trading sessions that followed, through Friday, the Dow Jones Industrial Average was up on 10 of them and gained 4.5 percent. Post-election, the Russell 2000 Index of smaller U.S. stocks extended its run of daily gains to 15, the longest such streak in two decades, which came to an end on Monday.