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** Asia-focused Standard Chartered among top FTSE100 risers in volume
** Traders say one catalyst for move is possibility BritishFinance Minister George Osborne will change a bank levy on theBritish banking industry at a speech later on Wednesday
** Times newspaper reports British Treasury expected to moveto replace the tax with a new corporation tax surcharge leviedsolely on UK assets, rather than global balance sheets, as now
** This could mean banks currently paying a lower share ofthe levy, such as Barclays, Lloyds Banking Group & RBS will contribute more, (HSBC &StanChart have paid lion's share), Times says
** StanChart most actively traded UK blue-chip stock, withalmost half its 90-day daily avg volume having gone through (RM: tricia.wright1.thomsonreuters.com@reuters.net)
