Apple is on the brink of reaching a $4 trillion stock market valuation, driven by investor confidence in its AI advancements and expectations for a rebound in iPhone sales, Reuters reports.

The tech giant’s stock has surged 16% since November, adding $500 billion to its market capitalisation, now at $3.85 trillion—outpacing the combined value of Germany and Switzerland’s main stock exchanges.

Apple’s integration of OpenAI’s ChatGPT across devices this month has bolstered market sentiment despite its relatively delayed AI strategy compared to rivals like Microsoft and Alphabet. The company’s June announcement to embed generative AI into its app ecosystem further fueled optimism about future product demand.

Though the iPhone 16 series faces modest holiday sales projections, analysts foresee iPhone revenue growth by 2025, supported by AI enhancements and broader geographic reach.