London (CNN Business) 1. Huawei ban: Another move by the Trump administration against China could send a shiver through global stocks Thursday.

President Donald Trump on Wednesday signed an executive order barring US companies from using telecoms gear from sources the administration deems a national security threat.

That action is seen as targeting Beijing and Chinese telecoms equipment maker Huawei. The US government on Wednesday also added Huawei to the so-called Entity List of companies it says undermine American interests. That means US companies may need a license to continue supplying Huawei with crucial components.

Intel INTC Qualcomm QCOM Micron MICR Microsoft MSFT Oracle ORCL For Huawei and its American partners, that could spell trouble. The company relies on US suppliers such asand, according to analysts. Intel and Qualcomm shares are down slightly in premarket trading.

The United States is already locked in a trade war with China. Both sides are still negotiating, but new rounds of tit-for-tat tariffs in the past week have made markets jittery.