June 24 : Cerebras shares tumbled about 14 per cent before the bell on Wednesday after the chip designer warned that annual profit margins would undershoot first-quarter figures in its debut earnings following a blockbuster initial public offering.If the losses hold through the open, the stock is expected to

June 24 : Cerebras shares tumbled about 14 per cent before the bell on Wednesday after the chip designer warned that annual profit margins would undershoot first-quarter figures in its debut earnings following a blockbuster initial public offering.If the losses hold through the open, the stock is expected to