Elon Musk's Cyberpunk approval helps boost video games maker CD Projekt further

FILE PHOTO: Tesla Motors Inc CEO Elon Musk unveils a new all-wheel-drive version of the Model S car in Hawthorne, California October 9, 2014. REUTERS/Lucy Nicholson/File Photo

WARSAW (Reuters) - Video games fan Elon Musk gave shares in Polish games producer CD Projekt a further boost on Thursday after the company's update of its flagship game prompted short sellers to close positions earlier in the week.

Shares in CD Projekt which is valued at almost 37 billion zlotys ($9.87 billion), jumped as much as 19% on Thursday, bringing the total gain so far this week to more than 50%.