I have invested in traditional securities for over 20 years and definitely see the opportunity of this space exploding in the future given the efficiencies and transparency that can be achieved. I believe there have been some security tokens already issued but not on exchanges because of the regulation; they have been placed with accredited investors, mostly in the venture capital space.
Another company in thr space issuing the first security token is tzero which is owned by a Fortune 500 company called Overstock. They have the systemic licenses and technology to launch an exchange to list and trade security tokens. They have also partnered with Polymath in the space. Given the trillions of dollar in these traditional assets, the space has huge potential.