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What are the clearing and collateral management arrangements for Derivatives Holiday Trading?

Please refer to Derivative Holiday Trading FAQs.

DCASS stands for Derivatives Clearing and Settlement System which serves as a single clearing and settlement system for both the HKFE Clearing Corporation Limited (HKCC) and The SEHK Options Clearing House Limited (SEOCH).

DCASS shares the same platform and infrastructure with the derivatives trading system, HKATS. HKATS and DCASS form the integrated trading and clearing system for the derivatives markets of HKEX.

What are the technical requirements for DCASS Online?

Participants can access DCASS via a browser frontend, namely DCASS Online, with SDNet line via Central Gateway connection. The technical requirements for DCASS Online are as below:

Minimum Requirement
Processor	Intel Core i3-550 3.2GHz or higher
RAM	8GB
Storage	3GB
Network adapter	100Mbps full-duplex
Monitor	21” with 1280 x 1024 resolution
Operating System	Microsoft Windows 10 (64 bit) (English Version)
Layered software	Anti-virus software
Supported Browser	Google Chrome browser version 124.0.6367.119 ^{(Note 1)}
Network Circuit	- via SDNet connection - Firewall/Services Ports configuration, if necessary

Note 1:

Although Google provides new Chrome browser versions from time to time, Participants are strongly recommended to install the above specified version at their PCs for DCASS Online. HKEX will only base on that specified version for trouble shooting for any DCASS Online related issue. Notwithstanding CPs are still able to connect to DCASS Online using the older version if they are not able to install the above version as scheduled by HKEX. Please note that HKEX’s trouble shooting services may not be a full functional support if CP is using the Chrome browser versions other than the above specified version.

How much is the connection fee for DCASS ?

Connection fee for DCASS Online access via the central gateway
(1 connection consists of 2 DCASS Online Users and 1 DCASS Administration User)

2,600/month/connection

Please see the below fee table as reference:

No. of DCASS Online Users	No. of DCASS Administration Users	Monthly connection fee
2	1	HK$ 2,600
> 2 and ≤ 4	1 or 2	HK$ 5,200
5 or 6	1 or 2	HK$ 7,800
≥ 2 and ≤ 6	3	HK$ 7,800

Sub-license fee for DCASS OAPI via the central gateway

2,600/month/connection

For details, please refer to corresponding Appendix A to HKCC Rules and Appendix G to SEOCH Procedures.

What should Participants do after inputting the correct URL but still cannot connect to DCASS Online?

Participants should perform the below steps:

Go to “Settings”, select “Privacy and Security” and then click “Clear browsing data”
Under “Time range”, select "All time". Then further select “Cookies and other site data” and “Cached images and files”, press "Clear data"
Close all windows and restart Chrome browsers
Input URL of DCASS Online connection and retry login

What is the SDNet bandwidth requirement for DCASS connection?

The minimum requirements for the SDNet bandwidth are as below:

Per Connection	Bandwidth Requirement for DCASS only
For DCASS OAPI connection	3 Mbps
For DCASS Online connection	0.4 Mbps
For Report retrieval solution	1 Mbps

Is there any number of row limitations on different views of DCASS Online?

There is limitation on number of rows depending on respective views of DCASS Online. For example, the limitation on “Trade history” view is 60,000 rows; Participants are recommended to tighten the searching “to” and “from” time.

Participants who have high volume of usage on particular function should develop their own OAPI program.

Participants can access DCASS through the DCASS Terminal which is designed to support Participant with low to medium clearing volume as it facilitates manual input of post trade activities. DCASS Terminal is connected through DCASS Server via Participants’ Network Gateways or HKEX’s Central Gateways.

Can Participant open other applications using Google Chrome at the same computer in the same time?

If Participants have already connected to DCASS via DCASS Online at the computer, they should not open any other applications of HKEX using Google Chrome at the same computer. Otherwise, there will be an error message “Server Error” popped up.

What is the security measure for Participants to access DCASS?

Participants can make use of the DCASS security features to manage passwords and access rights of their DCASS Online users. 2 DCASS Online users with full access to all available functions and 1 DCASS Administrator user will be set up for each Participant. Participants can manage their own user access profiles and reset passwords for their DCASS Online users by the DCASS Administrator user. For details, please refer to chapter 8 of DCASS User Guide.

Participants can connect their back-office system to DCASS using customized OAPI to enable straight-through-processing.

Participants should comply with the following password complexity requirements for their DCASS users:

Password Requirements

Types of DCASS User

DCASS OAPI User

(i.e. "BO_CXXX8xx"/"BO_CXXX9xx)

DCASS Online User

(i.e. "BU_CXXX1xx")

DCASS Administrator User

(i.e. "BU_CXXX2xx")

Password length

should be at least 8 characters and at most 20 characters in length

should be at least 16 characters and at most 20 characters in length

Password complexity

Password should contain a combination of:

at least 1 letter;
at least 1 numeric digit (0-9); and
at least 1 special character.

The acceptable special characters are:

!	"	#	$	&	(	)	*	+	,
-	.	/	:	;	<	=	>	?	@
[	]	^	_	`	{	\|	}	~

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