Nvidia reclaimed its post as the world’s most valuable company after the AI chip king delivered a “great” earnings report despite a “hurdle” from export restrictions to China.

Nvidia earned $18.8 billion, or 76 cents per share, for the period, a 26% increase from the same time last year. Revenue surged 69% from a year ago to $44.1 billion.

All eyes are on Nvidia (NVDA 0.87%) today as it prepares to report earnings. Why is the report such a big deal? For a couple of reasons. Nvidia dominates an area that drove stock market gains over ...