Stocks went on a rollercoaster ride Monday — with the Dow finishing in positive territory on upbeat comments from President Trump after plunging nearly 900 points on simmering stagflation fears. After days of mixed messages from the White House, the commander-in-chief said the conflict was “very far ahead of schedule,” sparking a late-Monday rally. The Dow closed up about 239 points, or 0.5%, while the Nasdaq and S%P 500 went up 1.4% and 0.8%, respectively. West Texas Intermediate crude oil