The rebound in shares of Taiwan Semiconductor Manufacturing Co. to a fresh record faces a key test with its earnings report Thursday amid intensified scrutiny after equipment supplier ASML Holding spooked chip investors.

Eased concern over Nvidia’s newest artificial intelligence product and optimism over Apple’s iPhone have renewed enthusiasm for their chip manufacturer TSMC. That drove its U.S.-listed shares up 30% from an August trough to touch a new peak.

The stock could get another lift from robust guidance following the company’s artificial intelligence-driven preliminary sales beat for the latest quarter, market watchers say. Its comments on demand will be closely parsed, particularly after ASML’s outlook cut in areas beyond AI sparked a slide in global chip stocks.