André Bartholomew Kostolany was a well-known stock market and financial expert.
Kostolany (born February 9, 1906 in Budapest, Austria-Hungary as Endre Kosztolányi; † September 14, 1999 in Paris) was a journalist, writer, speculator and entertainer of Hungarian origin and US citizenship.
He was born in Budapest as the fourth child of a wealthy Jewish industrial family. Kostolany's father was an industrialist and produced spirits (bitters), which were sold under the name Hercules. His father exported this to America in large quantities before the First World War. The company had existed since 1830. Kostolany described the household in which he grew up as "very wealthy". In addition to the servants, an Austrian governess, a Germanist, was employed in the household, who was responsible for his education during the Austro-Hungarian monarchy.
He was baptized a Roman Catholic. With the intention of becoming an art critic, he studied philosophy and art history, but then completed an apprenticeship with his friend, French stockbroker Adrien Perquel, at his father's request from the mid-1920s. In 1924, at the height of European inflation, he moved to Paris, where he gained his first experience as a stock market speculator. He successfully completed his traineeship and switched to Amerongen & Compagnie as a broker and consultant.