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

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NORDIC AMERICAN TANKER (NYSE: NAT) Delayed: 8.47 -0.11 (1.28%)
Previous Close $8.58    52 Week High $16.18 
Open $8.53    52 Week Low $7.57 
Day High $8.64    P/E N/A 
Day Low $8.43    EPS $-1.21 
Volume 4,341,209