The signs shone green for clear increases on all three major indexes on Wall Street for large parts of Wednesday.
But uncertainty increased and prices fell when Trump once again talked about 25-percent import tariffs on goods from the EU, Mexico, and Canada.
At the same time, he was vague and was interpreted as contradictory on questions about when the tariffs would take effect, which goods would be affected – and even if they would happen at all, writes Bloomberg.
All three indexes turned from green to red, before one of them turned again – but without reaching the level it had before Trump spoke.
When the dust had settled, the Dow Jones industrial index had fallen 0.4 percent, the tech-heavy Nasdaq composite index had risen 0.3 percent, and the broad S&P 500 index had closed unchanged.
The bumpy ride came after several days of volatile market sentiment and large price drops, not least in leading tech companies.
The question is whether the good mood returns or not when chip giant Nvidia releases its quarterly report after the market closes on Wednesday evening.
Nvidia has had a volatile development in recent weeks, but ahead of the report, Nvidia closed on a healthy plus 3.7 percent for the day.