Over the past few years, the Federal Reserve's use of unconventional monetary policy tools has led it to hold a large portfolio of securities. The asset purchases are intended to put downward pressure on longer-term interest rates, but also affect the Federal Reserve's balance sheet and income....

Over the past few years, the Federal Reserve's use of unconventional monetary policy tools has led it to hold a large portfolio of securities. The securities holdings in excess of historical norms have been shown to be putting downward pressure on longer-term interest rates. One question asked...