NIO Inc. (NIO) call put ratio 3.3 calls to 1 put into quarter results

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NUVEEN MUNICIPAL OPPORTUNITY FUND, Inc. (NYSE: NIO) Delayed: 3.83 +0.03 (0.79%)
Previous Close $3.80    52 Week High $14.86 
Open $3.74    52 Week Low $13.31 
Day High $3.85    P/E N/A 
Day Low $3.72    EPS $0.00 
Volume 25,857,404