Nvidia and Arm Holdings are the two best semiconductor stocks to buy for exposure to the fast-growing AI space.Artificial intelligence (AI) is poised to be one of the biggest disruptive secular growth trends of all time. Most sources project the global AI market to have a compound annual growth rate (CAGR) in the 30% to 40% range through 2030, with 2030 market sizes ranging from over $800 billion to more than $1 trillion.The AI revolution had been underway in recent years but just kicked into high gear in e ...