U.S. Stock Market: Major Indices Open with Volatility, Quantum Computing Stocks Soar

Miles Bennett
Published 2026-05-21About 5 min read

U.S. stocks opened with small contractions for the three major stock indexes, with the Dow Jones down by 0.3%, the S&P 500 down by 0.4%, and the Nasdaq down by 0.5%.

Nvidia turned positive after the open, now up over 1%, after being down by more than 1% at one point; storage-related stocks' gains expanded, with Micron Technology up by 3.3%, Seagate Technology up by 5%, SanDisk up by 2.2%, and Western Digital up by 2.6%.

Quantum computing stocks soared, with Quantum Computing up about 9%, Rigetti Computing up about 13%, and D-Wave Quantum up about 13%. Traditional tech giant IBM rose by 3.6%, marking its largest single-day gain in nearly two months. This comes after reports that the U.S. government allocated funds and acquired equity stakes in quantum computing companies.

Applied Digital Corp. gained about 8%, as the company announced a long-term data center rental agreement with a global hyperscale cloud service provider.

NIO Inc. was up about 5%, with the company's Q1 revenue increasing by 112% year-over-year, vehicle deliveries surging by 98%, and the gross margin on vehicles reaching a four-year high.

Intuit has plummeted by 19%, marking the largest percentage drop since March 2003, after the company announced a global workforce reduction of 17% (approximately 3000 employees) and the closure of regional offices.

NetEase fell about 6%, following the release of its Q1 earnings report which showed overall revenue and net profit underperforming Wall Street expectations.

Walmart's stock price fell by about 6%, recording the largest drop since February 2025, after its Q1 report showed that management provided extremely cautious guidance for the future macro consumer prospects.

Content is for reference only, not financial advice.