** ZG Group's 6676.HK shares jump as much as 16.4% to HK$2.55, set for biggest one-day pct rise since May 6
** Stock hits highest level since September 11
** Operator of third-party steel transactions digital platform says it plans to repurchase up to 107.11 mln Class A shares at max price of HK$10/share in open market with existing internal funds
** "The board considers that the prevailing trading price of the Class A Shares does not reflect the company’s intrinsic value and business prospects, and that the share repurchase reflects the company’s confidence in its long-term business prospects" - Co
** YTD, Hong Kong stock down 77.2%, benchmark Hang Seng Index .HSI up 32.8%
($1 = 7.7800 Hong Kong dollars)
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))