China's Nio teams up with Geely on auto battery swapping

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NUVEEN MUNICIPAL OPPORTUNITY FUND, Inc. (NYSE: NIO) Delayed: 4.53 -0.07 (1.52%)
Previous Close $4.60    52 Week High $14.86 
Open $4.51    52 Week Low $13.31 
Day High $4.54    P/E N/A 
Day Low $4.48    EPS $0.00 
Volume 17,982,430