quiet period
noun[S]
STOCK MARKETukusaperiodoftimewhen acompanyis firststartingtosellsharesduring which it is notallowedto say anythingpubliclyabout thedeal:
Thecompanyranintocontroversywhen amagazinereleasedaninterviewwith the co-founders during astrict"quietperiod"aheadof the company'sflotation.