Two of the most popular Exchange Traded Funds, tracking Strategy’s volatile stock, MSTX and MSTU, have both dropped over 80% so far in 2025, putting them in the category of the 10 worst performing funds in the entire US ETF market, which currently has nearly 5,000 active products. MSTX and MSTU became popular as they offered double the daily return, known as the 2x leveraged funds.
