If you go back to the time of J.P. Morgan, the world of high finance was completely wholesale. The prestigious investment banks on Wall Street appealed exclusively to large corporations, governments, and to extremely wealthy individuals.
Ron ChernowA prudent silence will frequently be taken for wisdom and a sentence or two cautiously thrown in will sometimes gain the palm of knowledge, while a man well informed but indiscreet and unreserved will not uncommonly talk himself out of all consideration and weight. (Alexander Hamilton's 'thesis on discretion' written to his son James shortly before his fatal duel with Burr.)
Ron ChernowIn the 1920s, Wall Street was a world that was really dominated by professional speculators and stock pools. These people had a monopoly over information.
Ron Chernow