Jumbo CDs in an investment portfolio A Jumbo CD is just that…JUMBO. A regular CD is usually small denomination; you can even buy one for $1000. Jumbo CDs start off at $100,000! They are low risk investments, and for large investors, they offer a stable investment. A Jumbo CD is structured much the same way as a regular CD. Sometimes called negotiable CDs, they are considered time deposits: the [...]