Nvidia ( NVDA -2.87%) stock jumped 17% in June, according to data provided by S&P Global Market Intelligence. It reported a phenomenal earnings report at the end of May, and that boosted investor confidence through June.

Nvidia executives cash out more than $1 billion in stock gains over the past year, including $500 million last month, as AI technology drives the company's market value to $3.8 trillion. CEO Jensen Huang and other top executives are strategically selling shares.