 Invesco DB Base Metals Fund NYSEARCA:DBB traded down 1 during mid-day trading on Thursday . The stock traded as low as 12.46 and last traded at 12.48, 19,900 shares changed hands during trading. A decline of 80 from the average session volume of 98,348 shares. The stock had previously closed at 12.60. The companys 50-day ... 