Investors bet on AI again after Micron reports 346% sales jump

By Anna Cooban, CNN London (CNN) — On Tuesday, investors were dumping AI stocks, worried that frothy valuations may be running away from reality. By Thursday, they were believers again. Micron Technology (MU), a US chipmaker, posted blockbuster quarterly results Wednesday afternoon, sending its stock up by more than 16% in pre-market trade Thursday. The