London (CNN Business) 1. Micron surge: Shares of Micron (MICR) rallied more than 10% in premarket trading Wednesday after the company reported solid earnings and said it had found a way to continue doing business with China's Huawei.

Micron, which is based in Idaho, said it conducted a legal review of its relationship with Huawei after a US export ban targeting the company was announced last month.

The chipmaker has determined that it can "lawfully resume shipping a subset of current products" that were not subject to American restrictions.

Even so, CEO Sanjay Mehrotra warned of "ongoing uncertainty" that could affect the business relationship, underlining the questions that currently face US tech companies that rely on the Chinese market.

"We cannot predict whether additional government actions may further impact our ability to ship to Huawei," he said.