Invesco S&P Global Water Index ETF (NYSEARCA:CGW – Get Free Report) saw unusually-strong trading volume on Friday . Approximately 20,871 shares traded hands during mid-day trading, a decline of 38% from the previous session’s volume of 33,700 shares.The stock last traded at $63.6590 and had previously closed at $63.66. Invesco S&P Global Water Index ETF […]