Transocean Shooting Up Into Close (RIG)

Transocean LTD RIG shares have started to shoot up into the close of trading today. There doesn't appear to be any news out there on the stock which would move it. At last check, shares of RIG were up $2.20 to $85.00, a gain of 2.66%. Volume is below average, with just over 4 million shares having changed hands today. The average daily volume is just over 5 million shares.