Economists Discover that Fed Bond Purchases Affect the Budget | Beat the Press:
The other point that should jump out at folks is that the projected drop in bond prices, which is the reason that the Fed is projected to lose money, presents a great opportunity for the government to reduce its debt burden. The idea is that long-term bonds issued at the current low interest rates will sell at sharp discounts later in the decade, if interest rates rise as projected.
These discounted prices will give the government the opportunity to reduce its debt by hundreds of billions of dollars -- perhaps more than $1 trillion -- simply by buying these bonds back at lower prices. Such a move would be utterly pointless since it would not change the country's interest burden at all, but since we currently live in a political environment where the debt to GDP ratio is an object of worship, this would be a great way to appease that god. It sure beats big cuts to Social Security and Medicare.