A mere three years ago, discount retailer Dollar General (NYSE: DG) was one of the market's hottest stocks. The company had seemingly found a formula for smashing success, offering a wide selection of basic goods at a great price to small, underserved markets.

Between its 2009 public offering and its pandemic-prompted peak, Dollar General stock logged a gain of more than 1,100%. Its store count has also grown, from a little more than 8,800 locations then to over 19,000 now, pushing its annual revenue up from less than $12 billion to nearly $40 billion.

In retrospect, though, we can now see the company's growth wasn't built to last. Many of its stores are regularly understaffed, and untidy to the point of being unsafe.

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Source Fool.com