The year is halfway over, and artificial intelligence (AI) investing hasn't gone anywhere. Companies are sticking to their plan to spend a record amount on data centers, which are primarily used to power the ever-growing AI workloads.There are several beneficiaries of this trend, but three of my favorites are Nvidia (NVDA 2.62%), Broadcom (AVGO 1.98%), and Taiwan Semiconductor Manufacturing (TSM 4.05%).These stocks aren't new; they've been top AI stocks to buy for several years now. However, there's still p ...