Walmart saw its largest sales growth in 10 years in the second quarter of 2018, executives said in an earnings call Thursday. Boosting those sales numbers was strong U.S. e-commerce sales, which ballooned 40%, and growth in grocery sales. Walmart's stock jumped about 10% on the news, CNBC reports.

Why it matters: Walmart has heavily invested in efforts to take on Amazon in online shopping, including a recent redesign of its website, and this Q2 earnings report reveals that their investment may be paying off. The company's successful report is also a good sign for retailers after many prominent stocks — including Macy's, JCPenney, Nordstrom, and Kohl's — plummeted Wednesday after Macy's reported no sales growth in Q2.