Can the company convince investors that its problems are fixable?Less than a year ago, things were good for Dollar General (DG 2.21%) shareholders. The stock traded around $150 per share. But it has now dropped more than 50% from its highs in 2024 and the sell-off has gotten worse since the U.S. presidential election even though stocks are generally soaring.Moreover, it's been a great five-year run for the S&P 500, with the index up close to 100%. But Dollar General stock is down about 50% during this time. ...