Key Points Rigetti Computing stock soared 20% this morning, and then saw its gain cut in half. The quantum computing start-up is not profitable, and its share price depends largely on momentum. 10 stocks we like better than Rigetti Computing › Shares of quantum computing company Rigetti Computing (NASDAQ: RGTI) 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%. Image source: Getty ...