Shares of Mobile TeleSystems (NYSE: MBT) are lower on the session by 0.87%, trading at $20.56.

Overall put volume is now running at 2.91x the daily average, with 33% of all puts traded being purchases on the offer. 1,501 contracts have traded on the session so far.

Mobile TeleSystems OJSC is a telecommunications provider in Russia and the Commonwealth of Independent States, providing a range of mobile and fixed line voice and data telecommunications services, including transmission, broadband, pay-television and various value-added services, as well as selling equipment and accessories.