The Nasdaq Composite has erased early gains as losses for shares of Microsoft Corp. and Nvidia Corp. accelerated, weighing on the broader index. Microsoft shares were down more than 6% earlier, while ...

US tech companies are scrambling to enhance their AI models amid the rise of cost-effective Chinese alternatives with similar computing power.

In Thursday's premarket trading, the Nasdaq Composite is up about .53% as of 8:30 a.m. ET. The big story last night was earnings reports from many leading stocks in technology. Companies ...