Apple, Microsoft cross $4 trillion market cap for the first time

Core Insights - Apple and Microsoft shares have surpassed a market capitalization of $4 trillion for the first time, although they remain behind Nvidia, which has a market cap exceeding $4.6 trillion [1][2] Group 1: Company Performance - Microsoft stock increased by approximately 3% following the announcement of a finalized 27% stake in OpenAI's for-profit business, which the company has supported since 2019 [1] - Apple shares have been on an upward trend, rising for 11 out of the last 12 trading days, attributed to strong sales of the newly released iPhone 17 models [2] Group 2: Upcoming Earnings Reports - Apple is set to report its fiscal fourth-quarter earnings on Thursday, while Microsoft will report earnings on Wednesday [2]