Wall Street market report
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(Close): US shares rose on Tuesday, buoyed by monthly car sales which beat analyst expectations.
The tech-heavy Nasdaq index added 28.46 points to close at 4,755.81.
The annual rate of US car sales in November was around 17.2m cars, the best pace for November since 2003.
Royal Caribbean Cruises gained 6.2% on news it was joining the list of S&P 500 companies. Companies' shares prices tend to rise when they join an index that is tracked by many investors.
Oil fell again, down by $2.12, or 3.1%, to $66.88 a barrel in New York trading.
Shares in RadioShack plummeted, falling over 8% on news that the struggling electronics retailer was engaged in legal proceedings with some of its lenders.