As the artificial intelligence (AI) revolution enters its third year, certain Wall Street analysts expect Nvidia (NASDAQ: NVDA) and Microsoft (NASDAQ: MSFT) to make history by becoming the first $4 trillion companies.

Key Takeaways The stocks of software companies such as Salesforce have soared this week on hopes that Chinese start-up DeepSeek's cost-efficient AI model could make AI applications significantly less expensive to develop and run.

Apple and other big U.S. companies reporting fatter profits than expected are helping stock indexes shave off more of their sharp losses from the start of the week.