April has been the weakest month for issuance in the domestic market with only $1.6 billion of corporate bonds issued to date. This compares with an average of around $8 billion in each of the first three months of the year. This is unlikely to improve much with three of the major banks announcing their interim results this week and next. Once this is out of the way issuance should pick  up in May.AOFM continued its twice weekly bond tenders, selling $700 million of April 2012 CGS on Wednesday at an average yield of 3.54 per cent. Oversubscriptions received were a very strong 5.5 times. On Friday $700 million of February 2017 Commonwealth bonds were sold at an average yield of 4.38 per cent. Oversubscriptions came in at 3.6 times.NSW Treasury Corp will add $150 million to its inflation-indexed 2035 line with pricing expected today or tomorrow. The addition will take outstandings to $614 million. Late last week the bonds were yielding around 2.8 per cent real. Rabobank Australia added another $50 million to each of its February 2012 and April 2014 euro medium-term note lines, taking outstandings to $375 million and $150 million, respectively. Rabo has been steadily adding to the February 2012 line since it was opened at $100 million, at the end of January. The April 2014 line was opened three weeks ago.In New Zealand, Reuters reported a NZ$25 million bond issue by Western Bay of Plenty District Council. The unrated council priced the bonds at 210 bps over FRAs for a five-year term to maturity. New Zealand Post also closed its NZ$200 million subordinated bond issue opened in late March. The bonds will commence trading on the NZDX today.Reuters also reported that Air Services Australia was meeting with investors in Melbourne and Sydney on Thursday and Friday. The meetings were described as a non-deal roadshow. In the old days that meant exactly the opposite. Air Services Australia has only one bond on issue in the domestic market - $100 million with a November 2011 maturity. This was rolled over in November 2006 from the original issue in May 2002. As a triple-A rated government-owned entity, the last rollover was priced flat to swap.Volkswagen was also said to be undertaking a non-deal roadshow next week. This should be interesting given the news on Friday that Volkswagen is considering acquiring Porsche outright, in a move that will eliminate just about all on balance sheet cash and no doubt strain credit quality. Volkswagen Financial Services Australia has a $100 million bond maturing 1 September.The general offer for Tabcorp bonds closed on Friday and the broker firm offer will close on Wednesday. At this time the final size of the issue should be disclosed. The bonds will commence trading on the ASX next Monday, on a deferred settlement basis.