Shares of Dollar General jumped nearly 16% on Tuesday after the discounter raised its outlook, saying it drew more middle- and higher-income shoppers amid fears that higher tariffs would hurt consumer spending.

Customers spent more per trip at Dollar General last quarter, a sign that higher-income shoppers may be looking to save — and possibly stocking up ahead of expected tariffs. Why it matters: Dollar stores have been struggling as Americans turned to budding alternatives such as same-day delivery from the likes of Amazon and Walmart.