The Fed - Recent balance sheet trends

It's the financial obligation the Fed took on it's balance sheet for the program of quantitative easing to stimulate the economy out of recession. What they did is buy debt at volumes that increased demand to such a level that the premium paid on the debt fell to zero interest rate which in effect lowered interest rates for borrowing to zero. Which ballooned their balance sheet by 3.5 Trillion Dollars. Now they have to unload it all to return to a condition of normal. The unloading process has started and will take several years. So this was just a progress report. This is one of the last items to fix from the 2008 recession stimulus.