In the last several months, several initiatives to deploy blockchain technology in the securities market have come to life, chief among them being Digital Asset Holdings now led by Blythe Masters and Overstock's Project Medici. Although the latter only recently diverged from its use of Counterparty's technology for representing securities as coins on the blockchain, it has nevertheless continued to make serious progress in now having applied to the SEC to issue $500M in stock on its new securities market. Much remains unclear, however: Is Overstock using the bitcoin blockchain or its own more centralized and proprietary protocol? How will one obtain access to this stock--and who will be eligible? How might other companies follow suit? It'll be incredibly interesting to watch this unfold.