TD Ameritrade and a slew of Wall Street firms invest an undisclosed amount in cryptocurrency exchange ErisX, which plans to launch spot trading in Q2 2019 (Frank Chaparro/The Block)

Frank Chaparro / The Block:
TD Ameritrade and a slew of Wall Street firms invest an undisclosed amount in cryptocurrency exchange ErisX, which plans to launch spot trading in Q2 2019  —  Brokerage giant TD Ameritrade, a slew of high-speed traders, and a long list of Wall Street firms are getting behind a brand new market …

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