Mexican President Felipe Calderon said on Saturday he thinks it is possible that the G20 members' contributions to the International Monetary Fund will exceed $430 billion. "I estimate that it could be a bigger capitalization" than was agreed in April, Calderon told reporters. The G20 is meeting here next week. In April, the IMF said it had secured at least $430 billion to increase its firepower, but many countries such as Brazil, China, Russia and Mexico itself have not yet said what specific amount they will contribute. (full story)