Updated 10/12/2025
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ANNEX IV - Delegated Regulation 2025/1155

ANNEX IV

Level of accuracy of business clocks

Table 1

Level of accuracy for operators of trading venues and systematic internalisers

Gateway-to-gateway latency time of the trading system

Maximum divergence from UTC

Granularity of the timestamp

> 1 millisecond

1 millisecond

1 millisecond or better

≤ 1 millisecond

100 microseconds

Increase granularity to 0,1 microseconds or better


Table 2

Level of accuracy for members, participants or users of a trading venue

Type of trading activity

Description

Maximum divergence from UTC

Granularity of the timestamp

Activity using high frequency algorithmic trading technique

High frequency algorithmic trading technique.

100 microseconds

0,1 microseconds or better

Activity on voice trading systems

Voice trading systems as defined in Table 2 of Annex II to Delegated Regulation (EU) 2017/583.

1 second

1 second or better

Activity on request for quote systems where the response requires human intervention or where the system does not allow algorithmic trading

Request for quotes systems as defined in Table 2 of Annex II to Delegated Regulation (EU) 2017/583.

1 second

1 second or better

Activity of concluding negotiated transactions

Negotiated transaction as set out in Article 4(1)(b) of Regulation (EU) No 600/2014.

1 second

1 second or better