Oct 24, 2024 · vanguard brokerage customers can buy cds, and they could be the best choice for you. Read our full vanguard cd rates review to learn more. 3 days ago · vanguard brokerage imposes a $1,000 minimum for cds purchased through vanguard brokerage. Yields are calculated as simple interest, not compounded. Brokered cds offer interest and fdic coverage that may be subject to limits.