Concerned about an AI bubble? Sign up for The Daily Upside for smart and actionable market news, built for investors. Let’s take a trip down memory-stock lane. Asset manager Roundhill last week launched the Roundhill Memory ETF (DRAM), a fund that targets companies manufacturing memory and data storage products, including Micron, Samsung and Sandisk. The fund is actively managed with an expense ratio of 0.65%. Unlike broader semiconductor and artificial intelligence-centric funds, the product is the first ...