It’s a complicated time for Nvidia (NVDA) as the company moves on from the recent GTC (GPU Technology Conference) week. Shares surged yesterday as a rally swept over the market, but the momentum seems to have subsided since then.

The chipmaker NVIDIA held its annual conference in Silicon Valley this week. Among the major announcements: it chose Boston to be the site of its first-ever research center for quantum computing, opening later this year.

Ahead of Nvidia’s first GTC Quantum Day, a group of four quantum stocks were down by an average of 7.1% in midday trading. Worst hit is D-Wave Quantum, down 9.5%. The group also includes Rigetti Computing,