Though it's far from a new approach, many exchange-traded funds (ETFs) aiming to provide exposure to the much-hyped artificial intelligence (AI) space tend to lean fairly heavily on a small number of big names. NVIDIA Corp. NASDAQ: NVDA, for example, is the single largest holding of the popular Global X Robotics & Artificial Intelligence ETF NASDAQ: BOTZ fund, representing nearly 12% of the entire portfolio. Even among broad-based tech ETFs like the iShares U.S. Technology ETF NYSEARCA: IYW, a company like ...