Increasing unusual put option volume: NAT HSBC CNC MSOS CIEN JETS NTNX

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NORDIC AMERICAN TANKER (NYSE: NAT) Delayed: 6.61 --0 (-0%)
Previous Close $6.61    52 Week High $16.18 
Open $6.61    52 Week Low $7.57 
Day High $6.61    P/E N/A 
Day Low $6.61    EPS $-1.21 
Volume 2,583