1. Pls see this question's title. In the screenshot below, as the strike prices below increase by +1, oughtn't the option premiums increase by +1 too?

  2. Why buy the \$104 put for \$13.71? The \$105 put looks more attractive to me; it has lower IV and costs only 4 cents more!

enter image description here

  • 1
    $\begingroup$ Volume of 0 and no bid or ask prices and minimal open interest suggests low liquidity so those "last" prices may have happened at very different times $\endgroup$ – Henry Mar 19 '20 at 18:21
  • $\begingroup$ The above comment by Henry appears to be the correct answer. You would need to compare bid/offer, or at least a close. $\endgroup$ – Brian Romanchuk Mar 19 '20 at 22:51

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