Surge in 2021 call buying. On Friday, over 1,980 contracts traded on a January 2021 $15 call option on Nektar Therapeutics (NKTR). With a prior open interest of 156 contracts, this represents a 16-fold surge in volume. With shares of the company currently trading around $17, the option buyer is about $2 in-the-money per $6.60 […]