A bank run affects just one bank. A banking panic or bank panic is a financial crisis that occurs when many banks suffer runs at the same time. In a systemic banking crisis, all or almost all of the banking capital in a country is wiped out.
A stock market crash is a sudden dramatic decline of stock prices across a significant cross-section of a stock market. Crashes are driven by panic as much as by underlying economic factors. They often follow speculative stock market bubbles.
