The average daily trading volume in agency MBS climbed to $215.9 billion in May, the highest reading of the year, according to the Securities Industry and Financial Markets Association. But don’t get too excited. May’s activity is still below the two-year high established in January 2015 and nowhere near the peaks established back in 2008 when crumbling financial markets caused investors to go gaga for agency MBS. The relatively low daily trading volumes continue...