What is SSCC's Financial Data Exchange Platform?

Writing about HKEX’s Integrated Fund Platform, I came across a line that deserved more attention than I first gave it. The communications network behind the IFP’s Order Routing Service is supported by the Financial Data Exchange Platform Network operated by Shenzhen Securities Communications Co, usually shortened to SSCC or, in Chinese, 深证通. I initially read that as a cross-border fund network that happened to predate the IFP. That understates it. Fund orders are only one of more than 20 types of business FDEP carries, and the platform began operating long before either the IFP or the Mainland-Hong Kong fund schemes that later used it.

SSCC came before the platform

SSCC was established in July 1993, with Shenzhen Stock Exchange and China Securities Depository and Clearing Corporation as its shareholders. Its original job was literal communications infrastructure for the Shenzhen securities market. The company’s timeline starts with a one-way satellite network distributing market prices, followed by a two-way network that helped turn Shenzhen from a regional exchange into a national one. It later combined terrestrial and satellite links for redundancy, then moved into data centres, cloud services and shared financial technology.

1. Jul 1993

   SSCC established

   Founded by Shenzhen Stock Exchange and China Securities Depository and Clearing Corporation.

2. 2003

   FDEP begins

   SSCC's own account of when the Financial Data Exchange Platform started operating.

3. 2006

   Formal rollout

   SSCC's corporate timeline records FDEP's formal rollout.

4. Jul 2015

   Mainland-Hong Kong MRF scheme launches

   Exposes the automation gap between Mainland and Hong Kong fund processing.

5. Feb 2016

   Direct connectivity to SSCC

   A global fund-messaging provider connects, giving Hong Kong firms a route into the Mainland network.

6. 2022

   Shenzhen Data Exchange launches

   A separate, unrelated marketplace for trading data as an asset — easily confused with SSCC.

7. 2025

   HKEX's Order Routing Service

   The IFP layer that routes fund subscriptions and redemptions over the FDEP network.

That history helps explain what SSCC is. It is not another fund platform and it is not the Shenzhen Data Exchange, the separate marketplace launched in 2022 for trading data as an asset. SSCC is an exchange-group technology company: it runs communications used by trading and settlement systems, but also supplies shared infrastructure to banks, brokers, fund managers, insurers and other financial institutions. FDEP is one business line within that larger role.

What FDEP was intended to solve

SSCC says FDEP began in 2003; its corporate timeline records the platform’s formal rollout in 2006. The problem it addressed was the number of connections financial institutions were otherwise building between themselves. A securities firm might need one link to each bank handling client-money custody, more links to fund managers and custodians, and still others to clearing and market-service institutions. Each bilateral connection brought its own development, testing, security and maintenance work. Add a new counterparty or workflow and much of that work had to be repeated.

FDEP changes the topology. An institution connects once to a shared network and can exchange data with other participants already on it. SSCC describes this as “one-point access” to the platform’s users and “one development” for rapid deployment. The useful idea underneath the slogans is straightforward: standardise the transport layer so that two institutions starting a new relationship do not also have to invent a new communications channel.

That makes FDEP closer to financial middleware than to an exchange. It does not decide whether an order should be accepted, match buyers and sellers, hold client assets or settle cash. It carries messages and files between the systems responsible for those decisions. The distinction matters for the IFP: FDEP supports the movement of subscription and redemption instructions, but it is not the nominee and settlement service HKEX still plans to build.

What actually moves across it

SSCC’s product list makes the platform easier to understand than its name does. The oldest use cases sit around cash and reconciliation. In third-party custody of securities client funds, FDEP carries real-time transfer instructions and end-of-day reconciliation data between banks and securities firms. In asset custody, it moves daily position-reconciliation and cash-transfer data between asset managers and custodians, replacing manual handling with electronic processing.

A second group covers instructions. Fund distributors use FDEP to send account-opening, subscription and redemption messages to public fund managers and bank wealth-management subsidiaries, which return confirmations over the same channel. Asset managers can transmit investment orders to executing brokers. Securities firms and fund managers use it for securities-financing instructions, while participants in the inter-institutional quotation system use it to reach the system’s core service providers.

Then there are files rather than live instructions. Transfer agents produce daily fund-sales data that must be reported to ChinaClear’s Centralised Data Exchange Platform, or CTP. SSCC describes FDEP as CTP’s underlying communications system, carrying those files between fund companies, distributors and the central platform. This is a useful reminder that “data exchange” here does not mean a single API or one message format. It is a network serving both real-time message flows and bulk file transfer across several different businesses.

How large it has become

The numbers on SSCC’s own FDEP page are substantial: more than 1,300 headquarters-level financial institutions connected, 250 million message packets exchanged on an average day, and more than 5,500 GB of files transmitted daily. Its users span securities firms, funds, futures companies, banks, insurers, third-party financial distributors and financial-information providers. FDEP also received first prize in the fifth China Securities and Futures Science and Technology Awards.

Those figures establish that the IFP is connecting to mature infrastructure rather than a network built for one Hong Kong launch. They need some care, though. They are current figures published by SSCC, not independently audited operating statistics. A message packet is not a transaction, file volume is not transaction value, and none of the three numbers is broken down by product. They therefore say nothing by themselves about how many fund orders pass through FDEP, how much of the traffic comes from the IFP, or how heavily any particular institution uses it.

From domestic utility to Hong Kong connection

For most of its life FDEP served domestic institutional relationships: bank to broker, manager to custodian, distributor to fund house, or market participant to a central service provider. Cross-border fund distribution added another edge to that network rather than redefining it.

The Mainland-Hong Kong Mutual Recognition of Funds scheme, launched in July 2015, exposed a particular mismatch. Mainland retail fund processing was already highly automated, while a significant portion of Hong Kong fund orders was still handled manually. By February 2016, a global fund-messaging provider had established direct connectivity to SSCC so that Hong Kong institutions could route MRF orders into the Mainland network without building their own SSCC interface. The important party in that arrangement was not the intermediary selling the connection. It was SSCC, which already sat at the common end of the Mainland relationships the Hong Kong firms needed to reach.

HKEX took the same underlying approach on a larger and more official footing in 2025. Its Order Routing Service gives distributors and transfer agents a standard channel for subscriptions and redemptions, while FDEP supplies the communications network underneath. Seen from SSCC’s side, the IFP is not a new purpose for the platform at all. It is another fund-sales order-routing workflow added to infrastructure that already carries similar messages among Mainland institutions.

What the connection does, and does not, tell us

Using FDEP gives HKEX an existing network with a large institutional footprint instead of forcing every IFP member to establish a new bilateral channel. It may also help explain why Mainland-linked institutions were among the earliest organisations ready to join: many belong to the market FDEP already serves. But the public record does not show which IFP members were previously connected, so it would be too strong to treat the choice of network as the reason the initial roster looks the way it does.

There is also a policy element that SSCC states more directly than HKEX does. SSCC presents FDEP as independently developed and domestically controlled, and says one purpose is to protect Chinese financial infrastructure from penetration or threats by overseas organisations. That is the operator’s own framing, but it makes clear that FDEP is not sold only as cheaper plumbing. Control over the plumbing is itself part of the product’s stated value. HKEX’s decision therefore connects Hong Kong’s fund-order layer to infrastructure designed not only for efficiency but also around Mainland China’s preference for domestic control of financial systems.

The limits of what outsiders can inspect remain wide. SSCC does not publish traffic by business line, participant-level adoption, realised cost savings, service-level performance or enough technical detail to map exactly how an IFP instruction travels through the network. HKEX does not publish IFP order volumes either. What can be established is narrower but still useful: FDEP started in 2003, became shared infrastructure across more than 20 financial workflows, and now provides the communications rail for one of the two live layers of Hong Kong’s newest fund platform. The IFP did not import a niche Mainland fund network. It attached itself to a much larger piece of China’s existing financial plumbing.