Empresas y finanzas
Stock futures tumble after grim November jobs data
* S&P futures drop 23.8 points, a session low, as data shows U.S. employers axed payrolls by a steeper-than-expected 533,000 in November for the weakest performance in 34 years.
* Investors also were on edge about the fate of the U.S. auto industry, with executives of the big three U.S. auto makers, including General Motors , returning to Capitol Hill to plead for a $34 billion government rescue.
* Payrolls were expected to fall by 340,000 and the unemployment rate to rise to 6.8 percent.
(Reporting by Ellis Mnyandu; Editing by Kenneth Barry)