 Keep your pets safe. Call Vicki at Invisible Vance, 265-2585. Wendell J. Montgomery, Skywatch Traffic. With the Wall Street Business Report, I'm John Scott. Stocks closed lower, extending a slump that left Wall Street with its worst week since April. The S&P 500 fell 0.7%. Its third straight drop since setting a record high on Tuesday. The Dow sank 0.9% and the Nasdaq Composite lost 0.8%.