Which investor was known as the key financier who helped calm the Panic of 1907?

J. P. Morgan was the key financier who helped calm the Panic of 1907.

The panic began after a failed attempt to corner the stock of United Copper Company and spread through trust companies and banks. Depositors withdrew funds, credit tightened, and the New York Stock Exchange faced severe strain. With no U.S. central bank then operating, private financial coordination became especially important.

Morgan convened bankers in his library and used his own authority and resources to organize emergency loans and support for threatened institutions. His intervention helped prevent a wider collapse, although the panic caused major disruption and a sharp market decline.

The episode demonstrated the risks of relying on one private financier as a lender of last resort. It helped build political support for a permanent central banking institution. Congress later created the Federal Reserve System in 1913. Morgan's role was influential, but the rescue also involved other bankers, the U.S. Treasury, and coordinated institutional action.