Insiders at artificial intelligence chipmaker Nvidia have dumped more than $1 billion in stock over the last year, according to a Financial Times report. About half of those sales occurred during the last month as the market notched new highs and shook off geopolitical tensions.

Nvidia insiders unloaded over $1 billion worth of Nvidia shares in the last year, and there has been a recent rush of sales as they tapped into growing excitement around artificial intelligence. Over half a billion dollars of those shares were sold in June alone,