## 4 exchange feeds without TCP/multicast

  • eSpeed
  • Dalian Commodity Exchange
  • SGX Securities Market Direct Feed
  • CanDeal (http://www.candeal.com) mostly Canadian dollar debt securities

I have evidence (not my imagination) to believe that these exchange data feeds don’t use vanilla TCP or multicast but some proprietary API (based on them presumably).

I was told other China feeds (probably Shenzhen feed) is also API-based.

ESpeed would ship a client-side library. Downstream would statically link or dynamically link it into parser. The parser then communicates to the server in some proprietary protocol.

IDC is not an  exchange but we go one level deeper, requiring our downstream to provide rack space for our own blackbox “clientSiteProcessor” machine. I think this machine may or may not be part of a typical client/server set-up, but it communicates with our central server in a proprietary protocol.

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