BRIEF-Citigroup CFO John Gerspach says Citi will focus on "high-quality" customers in world's largest cities
Feb 12 (Reuters) - Citigroup Inc : * CFO John Gerspach says Citi will focus on "high-quality" customers in world's
largest cities * Gerspach speaking at investor conference * Gerspach: Citi holdings continually testing market for asset sales, including
larger sales of mortgages * Gerspach: Citi hopeful industry can put mortgage rep and warranty exposure
behind it in 2013 or 2014 * Gerspach: Citigroup doesn't expect Citi holdings to break even in 2013
DAVOS, Switzerland - Central banks have done their best to rescue the world economy by printing money and politicians must now act fast to enact structural reforms and pro-investment policies to boost growth, central bankers said on Saturday.