U.S. stock indexes are split on Monday as drops for Nvidia and other Big Tech companies work against gains for oil-and-gas producers. The S&P 500 was virtually flat in late trading after erasing an earlier fall of 0.

Drops for Nvidia and other superstar stocks are dragging U.S. indexes lower and keeping Wall Street stuck in its weekslong rut. The S&P 500 fell 0.8% early Monday. The index is coming off its fourth losing week in the last five.

CEO Mark Zuckerberg’s recent comments about quantum computing’s timeline sent shockwaves through the industry’s pure-play stocks. But for investors with a sizeable risk appetite, the selloff in quantum computing names like Quantum Computing (QUBT),

Quantum stocks like Rigetti, IonQ and D-Wave Quantum saw steep losses after Nvidia CEO Jensen Huang said quantum computers are decades away.

The shares of IonQ Inc. and other companies linked to quantum computing tumbled in extended trading on Tuesday after Nvidia Corp. Chief Executive Officer Jensen Huang said “very useful” quantum computers are likely decades away.