ETFs See Strong March Performance Across Sectors Exchange-traded funds (ETFs) demonstrated impressive returns in March 2025, with notable performers like the Invesco China Technology ETF (CQQQ), which surged 26% in one month. Other standout ETFs included the United States Natural Gas Fund (UNG), up 20.5%, and the PIMCO 25+ Year Zero Coupon US Treasury ETF (ZROZ), gaining 4.6%.1