Gerald Tsai Jr. was the star stock picker of the “Go-Go 60s,” a period defined by the market’s love for Polaroid, Xerox, and other tech darlings that once held Wall Street as spellbound as Nvidia and Tesla do today. Later, when the bull market faded, Tsai emerged as a formidable Wall Street deal-maker and the first Chinese-American to run a Dow Jones Industrials company.

And he owed it all to his mother.