Empresas y finanzas
Wall Street slides on automakers, bank worries
* Obama administration replaces GM's CEO.
* Spain, Germany and the U.K. act to bolster banks.
* KBW bank index slides more than 9 percent.
* New York crude oil futures tumble 7.5 percent to around $48.50 per barrel.
* The Dow Jones industrial average lost 328.07 points, or 4.22 percent, to 7,448.11. The Standard & Poor's 500 Index dropped 34.92 points, or 4.28 percent, to 781.02. The Nasdaq Composite Index fell 56.39 points, or 3.65 percent, to 1,488.81.
(Reporting by Rodrigo Campos; Editing by James Dalgleish)