SmileDirectClub (NASDAQ: SDC) stock jumped 14.51%, which is the highest single-day gain since January, but the shares are still 30.2%  lower in the year, underperforming competitor Align Technology (NASDAQ: ALGN)  which gained 1.6%.  JPMorgan downgraded SmileDirectClub stock JPMorgan recently downgraded SmileDirectClub from “Overweight” to “Neutral,” citing its worse than anticipated […]