By Caroline Salas and Jody Shenn
For all the good the Federal Reserve’s $1.25 trillion of mortgage-bond purchases have done, they’ve also left part of the market broken.
By acquiring about a quarter of home-loan bonds with government-backed guarantees to bolster housing prices and the U.S. economy, the Fed helped make some securities so hard to find that Wall Street has been unable to complete an unprecedented amount of trades. Failures to deliver or receive mortgage debt totaled $1.34 trillion in the week ended July 21, compared with a weekly average of $150 billion in the five years through 2009, according to Fed data.