NIO (NIO) delivers 10k units in January

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NUVEEN MUNICIPAL OPPORTUNITY FUND, Inc. (NYSE: NIO) Delayed: 3.43 +0.03 (0.88%)
Previous Close $3.40    52 Week High $14.86 
Open $3.39    52 Week Low $13.31 
Day High $3.47    P/E N/A 
Day Low $3.39    EPS $0.00 
Volume 27,222,587