The Wall Street Journal reports that average daily bond trading volume increased 2% during the quarter ended June 30 compared with one year earlier. Corporate bonds and mortgage bonds increased significantly – by 13 and 11 percent, respectively. The increase in volume came even during a period where issuances of those bonds declined. Trading in treasuries actually fell by 2%. However, volume increased significantly in June (11.5% higher than the month earlier), likely due in part due to trading after the Brexit vote.