What is the difference between interest earned on a series ee bond and a series hh bond?

series HH bonds has total period of interest earn is of 20 years.

series EE  bonds  has total period of interest earn is of 30 year

Explanation:

United States government issues many different times of bonds during the different courses of time.  Series HH bonds start the series of H types of bonds from January 1980 till August 2004 with a maturity period of 10 years with allowing 10 years as an extension. Thus the total period of interest earn is of 20 years. while on another side, series EE type of bonds starts from 1980 till the government issuing the bonds. The maturity period of the EE bond is of 20 years with a 10 year extension period. Thus the total period of interest earn is of 30 year

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