blue chip share
From Longman Business Dictionaryblue chip shareˌblue ˈchip ˌshare (also blue-chip share) [countable]FINANCE a share in a well-managed company with a large amount of PAID-UP CAPITAL and a long record of paying profits to SHAREHOLDERs during good and bad economic conditionsSYNBLUE CHIP STOCK → share