Spectra T1 test environment upgrade

Dear Derivatives market test environment users,

We begin preparation for the next Spectra trading and clearing system release. So starting from 14:15 MSK October 19^th till October 30^th, 2020, the Spectra T1 test environment will be down for upgrade to version 6.6.

List of key changes:

- technical readiness for early trading session

- optimization of the client limit transaction performance

- transmission of roubles amount in collateral information streams

Full list of changes in the new version will be published after the test environment upgrade.

Preliminary production launch date for SPECTRA 6.6 is November 23^rd 2020.