Reuters:

Group of 20 officials will discuss increasing IMF resources at a meeting in Mexico City on Thursday and Friday, the first under Mexico's 2012 presidency of the group of developed and emerging economies.
The IMF said in a statement it will need $500 billion to lend to member countries in need, and IMF sources who were present at an IMF board meeting on the issue on Tuesday told Reuters that another $100 billion is needed as a "protection buffer."
The IMF also estimated there would be a $1 trillion global financing gap over the next two years if global economic conditions worsened considerably, the sources added.
On foreign exchange markets, the reports of plans for increased IMF lending capacity helped boost the euro.