Which banker's intervention helped end the Panic of 1907 in the United States?

J. P. Morgan's intervention helped end the Panic of 1907 in the United States.

The panic began after a failed attempt to corner the stock of United Copper Company triggered runs on banks and trust companies. The crisis spread through financial institutions in New York, where no central bank existed to provide emergency liquidity. Depositors and investors increasingly demanded cash.

J. P. Morgan gathered bankers, examined institutions, and organized private loans and support for firms judged capable of surviving. He also helped persuade the United States Treasury to supply funds. Morgan’s library became a famous meeting place during the emergency.

The episode exposed weaknesses in America’s financial system and helped build support for a permanent central bank. The Federal Reserve System was created in 1913. Morgan did not personally “fix” every failing institution, and the panic also involved actions by other bankers, government officials, and clearing-house associations.