The former head of the New York Stock Exchange is among veteran trading executives who are backing a start-up that aims to use the type of technology that underpins bitcoin for securities issuance and trading. Duncan Niederauer, the previous chief executive of NYSE, is part of a group that has produced $1.25m of seed money for Symbiont. The other members are Matt Andresen, trading head at Citadel who founded the Island ECN, and Getco founders Dan Tierney and Stephen Schuler.
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