It's a alphabetical number system.
From Wikipedia:
The first modern U.S. Savings Bonds were issued in 1935, to replace United States Postal Service Bonds. They were marketed as a safe investment that was accessible to everyone. The first bonds, series A, were followed by series B, C, D, E, EE, F, G, H, HH, and I.
how long does it take for a series 11 boud to mature?
About 17 to 20 years, depending on what series it is. The years I've listed above are for series EE.
Upon maturity the Series EE savings bond stops paying interest which brings up an interesting option for holders of matured savings bonds. Since the banks are paying close to zero on savings there is really no financial penalty for holding the Series EE bonds past the maturity date. In addition, federal tax on the interest earned on the savings bonds are not due until the bonds are actually cashed in which gives the holder the flexibility of shifting income to a particular year. For someone nearing retirement and holding Series EE bonds which have matured it would probably make sense to hold off on cashing in the bonds until retirement when the bond holder would probably have lower income and thus a lower tax rate.
A Series EE savings bond with a denomination of $100 and purchased in June 1999 would currently be valued at $77.72. Since the issue price is $50 for a $100 denomination savings bond, the purchaser of a bond in 1999 has accumulated $27.72 in interest. The interest rate on EE bonds issued in 1999 is variable and based on the yield of 5-year treasury securities. The current rate for a savings bond purchased in 1999 is only 0.63%. An interesting feature of the E Series savings bonds purchased in 1999 is that the government guarantees that the bond will be worth its face value at 17 years. For the example discussed above, the savings bond purchased for $50 in 1999 would be worth at least $100 in 2016.
2001
$25
twenty years
Pretty sure that depends on the interest rate at the time you purchase the EE series bonds. You can look up the value of EE bonds on the internet. You need the bond numbers and it will tell you when it was purchased and the current value and the percentage you are earning.
how long does it take for a series 11 boud to mature?
http://www.savings-bond-advisor.com/savings-bond-calculator/#calc
http://www.treasurydirect.gov/BC/SBCPrice
About 17 to 20 years, depending on what series it is. The years I've listed above are for series EE.
http://www.treasurydirect.gov/BC/SBCPrice
what does EE stand for calculator
EE stands for employee
Estonia
Patriot Bonds are Series EE savings bonds, which are specially inscribed with the words "Patriot Bond." The Patriot Bond series will begin December 11, 2001. Bonds increase in value every month, and interest is compounded semiannually. You can cash your bond after six months. Bonds cashed before they are five years old are subject to a 3-month interest penalty.