FYI - Official word that in order to minimize disruption, FICC - MBS, DTC, NSCC, and 2021 FICC - GOV operations will NOT be impacted either June 18, 2021 or June 21, 2021 this year by the Juneteenth National Independence Day Act.

https://www.dtcc.com/-/media/Files/pdf/2021/6/17/GOV1117-21.pdf

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