WASHINGTON: The Obama administration moved on Wednesday to exert more control over the shadowy over-the-counter derivatives market, now closely linked to the global credit crisis.

Federal regulators proposed subjecting all over-the-counter derivatives dealers - whose trades are not made through an exchange, making them hard to monitor - to "a robust regime of prudential supervision and regulation", including conservative capital, reporting and margin requirements.

The plan, sketched out by Treasury Secretary Timothy Geithner and top regulators at a news conference, marks a big step in the administration's push to rewrite rules for banks and financial markets in response to a credit crisis that has sent economies around the globe reeling.