 Nuveen Municipal High Income Oppty Fund NYSE:NMZ dropped 7.1 during trading on Wednesday . The company traded as low as 13.00 and last traded at 13.24, approximately 2,070,298 shares were traded during trading. An increase of 385 from the average daily volume of 426,725 shares. The stock had previously closed at 14.25. The businesss 50 ... 