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In an address at a Cincinnati-area manufacturing company yesterday afternoon, he hailed a "tidal wave of good news", while television coverage of his speech tracked a further plunge in the Dow toward minus 1,600 points in a corner of the screen.
That's the industrial average's biggest point drop of all time, and the worst percentage decline since 2011.
Here's what you need to know about what's going on with the stock market.
The selling on Wall Street has left the stock market on the verge of a "correction", which signifies a 10% retreat from a previous high.
Gold prices fell by 0.1 percent to $ 336.50 per troy ounce. The Dow is now negative for the year. The stock market sell-off of the early 1970s had earnings growth of more than 30%.
The trouble in the market began early last week, when investors focused on a number of lingering concerns. "Now with inflation indicators heading north, the Federal Reserve is expected to move more aggressively than previously thought". That's great news for Main Street.
Investors have also been nervously watching the bond market, where yields have been creeping higher. European indexes were down about 2 percent, while Japan's Nikkei lost 4.7 percent.
John Maynard Keynes said that panics were not so much the result of bad reasoning by individuals as by the way markets are organised and driven by groups of professionals trying to figure out what other professionals will do. Stocks were down about 2% in Britain, Germany and France. The S&P 500 index hit 2,716.74 at its low on Monday, representing a decline of 5.4% since its intraday peak at 2,872.87 on January 26, according to FactSet data.
Europe's main markets started down as much as 3 percent and shares tumbled in Asia after a wild day for US markets.
According to projections released in December, officials expect three rate hikes in 2018 - so long as market conditions remain broadly as they are - but some economists believe the central bank could add another increase at its final meeting of the year. Indeed, it all seemed to begin with the election of Donald Trump in November 2016. The Dow shed 1,597 points at its low and was recently off 1,092 points, or 4.3%.
During the worst day of the financial crisis in 2008, the market dropped by 800 points.
I keep hearing the term "circuit breaker". "The psychology of the market changed today".
How does a circuit breaker work?
The final numbers of the day are shown above the floor of the New York Stock Exchange in New York, US, February 5, 2018.
This would suggest that the markets may have risen more than they should have - animal spirits had got the best of them, as often happens. At its low for the day, during the scary period from 3 to 3:15 p.m., the S&P was down about 4.4%. After that, trading isn't halted unless the S&P drops 20% - market crash territory.
Does all of this mean we're entering a recession?
"You had a market that was overbought and ripe for something to undermine its tranquility", said Mark Luschini, chief investment strategist at Janney Capital. Unemployment is at a 17-year low, hiring is strong and growth is very solid (and expected to pick up more this year).
The yield on the 10-year Treasury bond, which in the previous couple of weeks put on more than 10 basis points, fell almost 2 bps in Asian trade on Tuesday to 2.65% as investors bought back into bonds.
Huddersfield have now lost four league games in a row and are being dragged ever further into the mire of a relegation battle. He added that the win was exactly the reaction he was hoping for from his team, after losing two consecutive games.
Once he got to Mobile, Mayfield immediately hit the practice field alongside Allen and the rest of the North squad. On the first day of drills, Stewart was one of the prospects that stood out to scouts and analysts alike.
The two front-runners in the Republican gubernatorial primary race in Michigan, Michigan Attorney General Bill Schuette and Lt. Andrea Munford with the steadfast leadership of Chief (Jim) Dunlap", Simon said. "With change comes pushback".
It is also suggested that the Rs1.5 lakh ceiling for deduction for principal repayment of housing loan in Section 80C be raised. Otherwise, as it stands now, the deduction is insignificant, especially when clubbed with other tax-saving instruments.
He says parents should be willing to talk to your kids about problems at home and school. "Everyone is just scared. Commonwealth Attorney Mark Blankenship said there is not a clear time table on when the suspect will be charged.
Kohli (112) soon followed the lead leaving the reigns to former captain MS Dhoni who then finished the match in style easily . According to a Cricket South Africa (CSA) release, the captain for the remaining ODIs will be named on Saturday.
Twelve North Korean female ice hockey players crossed the border last week to join their counterparts in the South. Ji has told his story in speeches and in videos distributed by human rights groups around the world.
All signs point to him being good to go, however, and if that's the case then we may be treated to an all-time Gronk performance. Louis Rams and presided over a train wreck of a 2-14 season, where three different quarterbacks started at least three games.
That's not going to change. " Referees have to protect, not just mine, all players". "Always I encourage him to think first". But the Community Shield? "We will see [Sane's injury] tomorrow, he could be out for two, three, four weeks".
Trump, who is due to make his own speech on Friday, argues that a strong US economy is a boon to the wider world. But the president, in a gathering dominated by the rich, is in a comfort zone underscored by his own wealth.
Kane penalty cancels out Salah stunner
You need to be sure or leave it but he obviously wanted to be the middle of interest, now he is, I can not change that. The Kop exploded in fury but Kane stayed calm and made no mistake the second time, beating Karius comfortably.
No progress on 'Dreamers' as another U.S. shutdown looms
Speaking on NPR radio, early Wednesday Democratic Senator Chris Murphy accused Trump of using the Dreamers as "political pawns". Take-home pay is going up, while consumer confidence is at a 17-year high and unemployment at a 17-year low, Ryan said.
Cardinals shut out of 2018 Hall of Fame class
After all, Ray Lewis was being investigated for murder at one point and ended up pleading guilty for obstruction of justice. Moss had nine, including the incredible 2007 season with New England, where he posted an NFL-record 23 scores.
No. 2 men's basketball takes down No. 4 Duke in thriller
That top-seeded team lost in the region finals to Syracuse, 68-62, after blowing a 16-point lead in the second half. State in Chapel Hill, the first time both programs dropped a game at home on the same day since February of 1973.
San Jose to host 2019 NHL All-Star game
While Bettman trumpeted the ability to "share NHL hockey with our fans overseas" he seemed nonplussed about skipping the Olympics. Sidney Crosby and Nathan MacKinnon are eight and nine points back of Nikita Kucherov, respectively, for the overall scoring lead.
NAFTA: Litmus Test on a Deal Will Come Over Next Few Days
Talks to renegotiate NAFTA - in effect since 1994 between the U.S., Mexico and Canada - are now in their sixth round. Union leaders hope the complaint will help push the USA toward stronger labor laws as NAFTA negotiations continue.
Will Trump's solar tariff do more harm than good?
After all, USA appliances tend to be more expensive, because we tend to pay our workers more than Chinese and Korean companies. The only difference is that while Obama's tariffs were focused on China specifically, Trump's apply to all foreign producers.