Patrick Byrne, CEO of US online retailer Overstock, unveiled tØ.com today at the headquarters of the major US stock market Nasdaq in New York today.

The announcement marked the formal debut of tØ (pronounced tee-zero), Overstock's long awaited blockchain-based private and public equities trading platform first announced in 2014.

Byrne also unveiled a "big surprise" in the form of the platform's Preborrow Assured Token, which Byrne suggested would democratize securities lending. The product, he said, is already being used in an enterprise pilot program, and is the subject of interest by major banks.