U.S. stocks hit record highs, with Dow breaching 35,000, even as delta variant concerns grow

The tech-heavy Nasdaq added 152.39 points, or 1 percent, to end the trading day at 14,836.99, also a record. It gained nearly 3 percent on the week, boosted by strong earnings: Snap and Twitter walloped expectations with robust revenue and user growth, powering their shares; Twitter shares climbed 3 percent, while Snap sailed nearly 24 percent.