Brokers at the New York Stock Exchange have come to personify the life-altering thing called Wall Street.

On the floor of the New York Stock Exchange, brokers have to bear the burden of having come to personify Wall St. — an all-encompassing name for the stock market, the economy, your 401(k).

Leaders of many of New York City’s largest companies gathered at the New York Stock Exchange to discuss how they and government officials should respond to the financial crisis.

At a time when the markets are so unsettled, some public relations-types wonder: Who wants to ring in — or out — the next black day on Wall Street?

At a time when the markets are so unsettled, some public relations-types wonder: Who wants to ring in — or out — the next black day on Wall Street?

Maurice R. Greenberg may “materially decrease” his holdings in the American International Group, whose shares have declined more than 90 percent this year.

Merrill Lynch and Lehman Brothers rode similar paths of decline but had vastly different endgames.

Shares of United Airlines lost nearly all their value when a false bankruptcy rumor swept financial markets.

Shares of United Airlines lost nearly all their value when a false rumor swept financial markets on Monday.

Shares of United Airlines lost nearly all their value when a false rumor swept financial markets on Monday.