During the post-market session on September 23, quantum computing stocks displayed divergent performance. As of press time, IONQ traded down 0.47% at $42.34 in post-market, while QBTS gained 0.77% to $16.94. The sector showed mixed movements with limited overall volatility.

Looking at regular session performance, quantum computing concepts saw active trading throughout the day. IONQ closed regular trading at $42.54, up 4.42% from the previous session, with an intraday high of $46.05. QBTS settled at $16.81 during regular hours, down 4.26%. Post-market trading volume contracted significantly compared to regular session, reflecting cautious investor sentiment.

RGTI edged up 0.09% to $16.02 in post-market, while QUBT declined 0.22% to $9.10. As a frontier technology sector, quantum computing has attracted sustained market attention recently, though individual stock performance varies considerably. Investors should closely monitor each company's technological progress and commercialization timelines.

Sector constituents