** Hang Seng Bank rises 2.9 pct to highest sinceSeptember 2008
** Selling stake in China's Industrial Bank Co Ltd worth up to 16.8 bln yuan
** Hong Kong-based lender says net gain on stake saleestimated at HK$7.6 bln
** Benchmark Hang Seng Index down 0.1 pct (RM: donny.kwok.thomsonreuters.com@reuters.net)