The year 2014 was the year that megadeals in the bond markets became more commonplace.

Some 23 deals of $5 billion or more were done globally in 2014, more than double the 11 of 2013. Volume on $5 billion-plus deals is up to a record $168.4 billion year-to-date, excluding financials, according to Dealogic, compared with $124.6 billion in all of 2013.