Commodity ETFs had a rough month in April, with the majority of the funds ending up in the red. Industrial metals were the hardest-hit category, with the iPath Series B Bloomberg Tin Subindex Total Return ETN (JJT) falling 7.9%. It was followed by the iPath Series B Bloomberg Aluminum Subindex Total Return ETN (JJU) and the iPath Series B Bloomberg Nickel Subindex Total Return ETN (JJN), which fell 6.61% and 6.06%, respectively. The United States Gasoline Fund LP (UGA) was the top performer, with a gain of 11.23%, while the United States Oil Fund LP (USO) and the iPath Bloomberg Cocoa Subindex Total Return ETN (NIB) were up 6.4% and 4.79%, respectively. Flows were generally muted, though the SPDR Gold Trust (GLD) topped the outflows list with a loss of $1.5 billion. The iShares S&P GSCI Commodity Indexed Trust (GSG) came in second, with outflows of $113.8 million, and USO lost $82.8 million. At the other end of the spectrum, the Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF (PDBC) gained $80.8 million, the iShares Silver Trust (SLV) pulled in $42.2 million and the United States Natural Gas Fund LP (UNG) gained $26.6 million. Source: Bloomberg. Data from 03/29/2019 to 04/30/2019. ETFs chosen to represent each sector based on the most liquid ETF in each segment of the ETF.com ETF Classification System.