File picture: Reuters.

Johannesburg - Shares of Merafe Resources jump after the ferrochrome producer says first-half earnings and production more than doubled.

Merafe says headline earnings per share, the primary measure of profit in South Africa, rose 134 percent to 8.9 cents while production climbed 16 percent in the period.

Its shares are up 6.2 percent at 1.37 rand. - Reuters