Auto parts maker reports profit margin, sales also enjoyed increase.
Investors buoyed by continuing negotiations between U.S., China.
Four-day winning streak comes to an end for stock market.
Parks set attendance record, but company expected a better return on its capital investments.
Energy companies lead charge; market on 4-day winning streak.
Gains by tech companies, banks fuel rally.
Stocks of small companies fare better.
S&P 500 index has second consecutive weekly gain.
Negative vibes lead to big slide in trading.
U.S. stocks end up slightly lower Wednesday, snapping the market's five-day winning streak.