Quantum computing stocks stir again as IonQ jumps; what investors watch into Tuesday
New York, Jan 18, 2026, 12:48 (EST) — Market closed. Quantum computing stocks wrapped up the last U.S. session with gains, led by IonQ despite a mostly flat Wall Street ahead of the long weekend. IonQ jumped 6.8% to close at $50.80. Rigetti climbed 3.7% to $25.62, Quantum Computing Inc added 4.0% to $12.70, and D-Wave edged up 0.5% to $28.83. Meanwhile, the S&P 500 and Nasdaq each dipped 0.06%. (Reuters) Monday’s market closure for Martin Luther King Jr. Day means trading picks back up Tuesday, a combo that often shrinks liquidity and amplifies swings in volatile names. Quantum stocks