Efficiency and sustainability of bond market: Evidence from aftermarket trading of US corporate bond offerings

We find that for bond offerings that are non-self-marketed, there is a significantly larger proportion of institutional-sized sell trades than buy. In stark contrast, for self-marketed offerings by underwriters, immediate post-offer trading is characterized by a larger proportion of institutionalsized buy trades than sell. We also find evidence suggesting that retail investors, who are initially shut out of the offering deals, buy bonds in the secondary market at a higher price. Our evidence suggests that certain institutional investors receiving allocations of non-self-marketed offerings flip them for a quick profit. The systematic disparity in aftermarket trading immediately following self-marketed versus non-self-marketed bond offerings suggests that the offering process is inefficient, which may have implications on the sustainability of bond offering process.