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.
Final Maturity. Series EE savings bond don't stop earning interest as soon as they double their face value. Rather, they have a final maturity of 30 years. This means that the bond will continue earning interest for 30 years after you bought it, regardless of whether it doubles in value after 20 years with a special Treasury payment or earlier.