From Brian Sack, Executive Vice President, Federal Reserve Bank of New York: Preparing for a Smooth (Eventual) Exit. Excerpts on MBS:

The Federal Reserve is approaching the scheduled end of its large-scale asset purchases. We have bought $169 billion of agency debt to date, nearly fulfilling our plan to purchase "about $175 billion."

For MBS, we have only about $30 billion of purchases remaining to reach our $1.25 trillion target. In addition, we completed $300 billion of purchases of Treasury securities late last year. Looking across these programs, we have now purchased $1.69 trillion of assets, bringing us 98 percent of the way through our scheduled purchases.

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Source: www.calculatedriskblog.com