Definition. 1  A blood clot is a thickened mass in the blood formed by tiny substances called platelets. Clots form to stop bleeding, such as at the site of cut. 2  As soon as a blood vessel wall is damagedâby a cut or similar traumaâa series of reactions normally takes place to activate platelets to stop the bleeding.
Series EE bonds mature after 30 years, meaning they can earn interest for that period of time. EE bonds are sold for half of face value and the U.S. Treasury Department guarantees they will reach face value after 20 years. Bonds must be owned for at least one year before redemption.
1 Time to maturity: Consider two bonds that each cost $1,000 and yield 5%. 2  A bond that matures in one year would more quickly repay its true cost than a bond that matures in 10 years. 3  As a result, the shorter-maturity bond would have a lower duration and less price risk. 4  The longer the maturity, the higher the duration. The longer the maturity, the higher the duration. 2  Coupon rate: A bond's payment is a key factor in calculating duration. 3  If two otherwise identical bonds pay different coupons, the bond with the higher coupon will pay back its original cost quicker than the lower-yielding bond.