NIO Inc. (NIO) March weekly option implied volatility into quarter results

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NUVEEN MUNICIPAL OPPORTUNITY FUND, Inc. (NYSE: NIO) Delayed: 5.05 +0.03 (0.60%)
Previous Close $5.02    52 Week High $14.86 
Open $4.96    52 Week Low $13.31 
Day High $5.19    P/E N/A 
Day Low $4.94    EPS $0.00 
Volume 30,370,034