Each of its previous transactions have been viewed by the bank as a means of optimizing a strong balance sheet and funding an acquisition trail that now spans the length of Asia. Many observers, however, remain curious why the bank has opted for a tier 1 issue when it already has too much capital, tier 2 debt would be less expensive and would enhance rather than diminish its return on equity (currently 12.89%). Most have concluded that the move must pre-figure another and this time highly expensive acquisition that requires a large write-off against tier 1 equity.