I don't talk to their developer teams so I wouldn't know. I wouldn't expect them to move quickly enough for that to have been publicly announced by now. My gues

I don't talk to their developer teams so I wouldn't know. I wouldn't expect them to move quickly enough for that to have been publicly announced by now. My guess is either ethereum or hyperledger fabric depending on how much of their system they would want completely public. Queries per second is a huge concern there too, so it might be a while off for NYSE for this reason alone.