Hottinguer & Cie. survived and even thrived thanks to its continued involvement in the major financial events of the time, as well as Rodolphe Hottinguer's inherited interest and knowledge of the issue of public debt.
By this time, Rodolphe could rely on the help of his son Henri Hottinguer (1868-1943), who was present in 1919 at the signing of the Armistice with Germany, and on whose shoulders would fall the arduous task of coping with the Great Depression.