What happened Shares of Dollar Tree (NASDAQ: DLTR) are tumbling 10.3% in morning trading Tuesday after the deep discount retailer reported third-quarter earnings. Although Dollar Tree beat Wall Street expectations on the top and bottom lines, its profit guidance for the full year was below forecasts, as margins are under pressure because of persistently high inflation. While it abandoned its pure-play dollar status several years ago with a $1.25 baseline price and started offering products slightly more expensive than that, it's been a retailer seen as a go-to destination to stretch wallets during inflationary times.