In its second intervention during the day, aimed at restoring confidence among stock market participants, two senior officials of the finance ministry said FIIs and mutual funds have been net buyers since morning. Chief Economic Advisor Ashok Lahiri, and Economic Affairs Secretary Ashok Jha, told the media that banks will continue to do their bit to ensure liquidity and help brokers clear their positions.A statement read by Jha said: "It appears that some brokers trading on proprietary accounts may have come under margin pressure and, therefore, may have sold. The RBI has made it clear that banks have been advised to provide ample liquidity to those who may require money to meet margin requirements. Banks are doing so. That position stands and will continue to be so."