Beijing, April 10 (Xinhua)-- the total size of the Fed's balance sheet expanded to an all-time high of $6.13 trillion from $5.86 trillion a week ago on April 8, according to Federal Reserve data.

The Fed's holdings of Treasuries stood at $3.63 trillion on April 8, up from $3.34 trillion a week ago, while holdings of mortgage-backed securities remained unchanged at about $1.46 trillion for a week, according to the data.

The COVID-19 epidemic braked the global economic engine and the stock market entered a bear market. In order to restore market confidence and ease market pressure, the Federal Reserve has taken a series of large-scale interventions to protect capital markets and the United States from the outbreak.

Bank of America Corporation, Financial TimesTaken together, these measures could push the Fed's balance sheet above $9000bn by the end of the year, accounting for more than 40 per cent of US GDP, analysts said.

Before that, BlackrockIt also said it expected the Fed's balance sheet to expand to a staggering $10 trillion this year.