Stocks with call strike movement; RIG NBR FLY ON THE WALL 11:50 AM ET 01/26/15 Symbol Last Price Change RIG 16.3 +0.63 (+4.02%) NBR 11.365 +0.245 (+2.2%) QUOTES AS OF 01:08:01 PM ET 01/26/2015 Transocean (RIG) May 20 call option implied volatility decreased 6% to 56, Nabors Industries(NBR)June 8 call option implied volatility increased 3% to 60 according to IVolatility.