Quantum Corp (NASDAQ:QMCO) and D-Wave Quantum (NYSE:QBTS) led a decline in quantum computing stocks on Monday, almost closing the year, which for the most part gave them skyrocketing gains.

Shares of Quantum Corp tumbled about 12% on Monday, while D-Wave Quantum and SEALSQ Corp fell about 6%. IONQ Inc. fell 2.6%.

Quantum computing stocks have taken investor interest by storm this year. Major updates in the quantum space, included a "mind-boggling" quantum computing chip known as Willow by Alphabet's (GOOG) (GOOGL) unit, Google, Amazon Web Services (AMZN) announcing its Quantum Embark Program, and Quantum Computing (QUBT) recently seeing a contract from the National Aeronautics and Space Administration, or NASA.

Wall Street analysts have also jumped into the debate about quantum computing, and have largely started with bullish views with a hint of caution.

Year-to-date, Quantum Computing (QUBT) has surged over 1,900%, Rigetti over 1,600%, and D-Wave Quantum (QBTS) has gained nearly 960%. IonQ and Arqit has soared around 260%, each (data as of Dec. 30.).