Flat price

Flat price (also clean price)

The quoted newspaper price of a bond that does not include accrued interest. The price paid by the purchaser is the full price.

Clean Price

The price of a coupon bond that does not include any interest that accrues. That is, a clean price is the price of a bond discounting future cash flows. Because the dirty price does include interest between coupon payments, the dirty price and the clean price will equal each other only immediately following a coupon payment. Most American exchanges use the clean price when quoting bond prices.