Nov 20 (Reuters) - HKEX Filing"
* HSBC BOUGHT BACK 400,000 SHARES FOR HK$28.5 MILLION ON NOV 19 - HKEX FILING
* HSBC BOUGHT BACK 4.0 MILLION SHARES ON OTHER EXCHANGES FOR GBP29.1 MILLION ON NOVEMBER 19 - HKEX FILING
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