Momentum traders love Rigetti Computing stock. Should you?

Shares of quantum computing company Rigetti Computing ( RGTI 14.29% ) soared as much as 20% in early trading on Friday before giving back about half its gains -- all on no obvious news.

As of 11:20 a.m. ET, Rigetti stock was still up 12%.

Introducing Rigetti Computing

Rigetti bills itself as "a pioneer in full-stack quantum computing ... selling on-premises quantum computing systems with qubit counts between 24 and 84 qubits, supporting national laboratories and quantum computing centers."

That's both good and bad for investors.

The good side of being a "pioneer" is that it gives early investors in Rigetti a ground-floor investment in an exciting new field of business that could remake how cybersecurity operates and

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