Ocean Rig UDW has been warned by the Nasdaq Stock Market after its share price fell below $1 for 30 consecutive business days.

A requirement for continued listing on the Nasdaq Global Select Market is that shares remain above this $1 threshold.

As a result the George Economou-led driller has been given a 180 day grace period to regain compliance which gives it a deadline of 27 March 2017.

However,