Nio Inc. (NIO) Buys Stake in GreenWing Resources

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NUVEEN MUNICIPAL OPPORTUNITY FUND, Inc. (NYSE: NIO) Delayed: 3.41 -0.13 (3.67%)
Previous Close $3.54    52 Week High $14.86 
Open $3.49    52 Week Low $13.31 
Day High $3.49    P/E N/A 
Day Low $3.36    EPS $0.00 
Volume 39,737,391