Complex sentence: Riefler is credited with inventing the modern amortized home mortgage, which was designed to be more stable than the balloon mortgages common during the 1920s, Hyman, Louis.
Split into simpler sentences: Riefler is credited with inventing the modern amortized home mortgage. This new mortgage type was designed to be more stable than the balloon mortgages common during the 1920s, Hyman, Louis.