Wall Street slides at open on banks and spending woes
* The Dow Jones industrial average was down 137.55 points, or 1.63 percent, at 8,311.01. The Standard & Poor's 500 Index was down 14.78 points, or 1.70 percent, at 857.01. The Nasdaq Composite Index was down 23.79 points, or 1.54 percent, at 1,522.67.
(Editing by James Dalgleish)