U.S. lawmakers in the House of Representatives on Monday voted against the biggest proposed government intervention in the U.S. economy since the Great Depression of 1929. The news board delivers the bailout defeat to New York streets on Monday. 1 of 3 Government officials, Treasury chiefs and political leaders from both sides of the political divide thought they had agreed Sunday on the details of a $700 billion rescue plan that would prop up the nation's ailing financial system -- and be supported in the House of Representatives. As it became apparent the vote was lost, the Dow Jones plunged. Preliminary tallies had the Dow losing 777 points -- the worst single-day point loss ever, topping even the loss following the September 11 terrorist attacks. Monday's plummet knocked out approximately $1.2 trillion in market value, the first post-$1 trillion day ever, according to a drop in the Dow Jones Wilshire 5000, the broadest measure of the stock market. However the 7 percent decline does not rank among the top 10 percentage declines.