Ashmore Group, the FTSE 250 investment manager, saw a 31% increase in assets under management in its final quarter.This performance was achieved through several significant increases scored by the firm's investment "themes". Notably, local currencies saw a 24% increase while corporate debt rose 27%.Net inflows, that is money coming into the company minus money being taken out, were $4.6bn.Performance fees for the year overall are estimated to be £85 million.The trading statement was greeted warmly by investors, with the share price rising 2.57% to 403.80p.BS