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.
Electronic savings bonds have more flexibility than paper bonds in that they can be bought in any increment of $25 up to $5,000. Paper bonds have seven increments of $50, $75, $100, $200, $500, $1,000 and $5,000. I savings bonds accrue value every month and take thirty years to fully mature. Interest compounds every six months. The formula is rather complicated: it is the fixed interest rate plus two times the half year inflation rate plus the fixed rate times the half year inflation rate.