Byron Wien

Byron Richard Wien (; February 14, 1933 – October 25, 2023) was an American investor. After a long career as an executive at Morgan Stanley, he became vice chairman of Blackstone Advisory Partners, a subsidiary of The Blackstone Group. He was regarded as one of Wall Street's most prominent market strategists.

Wien's memoir, which he co-authored with former Blackstone colleague Taylor Becker, was published posthumously on November 12, 2024.