The average daily trading volume in agency MBS fell to $192.1 billion in December, the lowest reading of the year, according to the Securities Industry and Financial Markets Association. For the full year, however, average daily trading volume in agency product came to $206.6 billion, compared to $193.0 billion in 2015 and $178.0 billion in 2014. The last time trading volume was higher than in 2016 came three years earlier when $222.8 billion in agency product was traded on a daily basis. What the numbers actually mean is...