Sector Water Global CGW Invesco S&P Global Water Index ETF 4 2 2 0.001 FIW First Trust Water ETF 4 2 2 0.001 PHO Invesco Water Resources ETF 4 2 2 0.001 PIO Invesco Global Water ETF 4 2 2 0.001 TBLU Tortoise Global Water ESG Fund 4 2 2 0.001